Liquidity and Working Capital

Can the company pay what it owes this year?

A profitable manufacturer can still miss payroll. A retailer with rising sales can still max out its revolving credit line before spring collections arrive. A fast-growing distributor can report record revenue on the income statement (profit and loss statement, also called the P&L, the report of revenues and expenses over a period) while its bank balance falls because customers are paying slower and inventory is building on warehouse shelves. None of these outcomes requires fraud. They require a manager to read liquidity: whether the company can meet near-term cash demands without selling long-term assets, restructuring debt on emergency terms, or begging suppliers for extensions.

Unit 6 turns the financial statements you learned to build in Units 1 through 5 into decision tools. This first lesson focuses on the short end of the balance sheet: current assets (assets expected to convert to cash or be used up within one year or the operating cycle) and current liabilities (obligations due within the same window). You will learn working capital (the dollar cushion between those two totals), the three headline liquidity ratios most lenders and credit analysts use, and the cash conversion cycle (how many days cash is tied up in operations before suppliers are paid and customers' cash is collected). You will also see why seasonal businesses break naive ratio reading, and how the statement of cash flows from Unit 5, Lesson 3 (Building the Statement of Cash Flows) confirms or contradicts what the balance sheet snapshot suggests.

The failure mode is familiar in boardrooms and bank meetings. A chief financial officer (CFO, the executive responsible for finance and accounting) presents a current ratio above 2.0 and declares liquidity "strong." A credit officer asks about inventory obsolescence and receivable aging. A supplier asks why accounts payable (AP, amounts owed to suppliers) stretched from 30 days to 55 days. A division head burned cash paying down debt while accounts receivable (AR, amounts customers owe after delivery) ballooned. The headline ratio looked fine. The quick ratio and cash conversion cycle told a different story. This lesson teaches you to read all three layers before you trust a single number.

Liquidity, solvency, and why lenders read the balance sheet before the income statement

Liquidity is the ability to pay obligations that come due soon, usually within the next twelve months or the company's operating cycle (the time from buying inventory to collecting cash from customers who bought that inventory). Solvency is a longer-horizon question: whether the company can meet all obligations over time, including long-term debt and lease commitments, without restructuring or liquidating. Liquidity is about this year's payroll, this quarter's interest, next month's supplier invoices. Solvency is about whether the capital structure is sustainable for five years. Unit 6, Lesson 4 (Leverage and Solvency) takes the long-horizon view. This lesson previews the distinction because beginners routinely conflate them.

A company can be liquid today and insolvent in three years if it funds losses by borrowing without fixing the business model. A company can be solvent on paper, with valuable factories and strong brand equity, and still illiquid tomorrow if its cash is trapped in slow inventory and its revolving line is fully drawn. Profitability from Unit 6, Lesson 2 (Profitability and Margin Analysis) does not guarantee liquidity. Liquidity does not guarantee long-run solvency. Smart stakeholders read both.

The balance sheet (statement of financial position, a snapshot of assets, liabilities, and equity at one date) is the primary source for liquidity analysis because it shows what resources are available now and what is owed soon. The income statement tells you whether the business model earned a profit last period. The statement of cash flows tells you whether that profit became cash. From Unit 1, Lesson 5 (The Financial Statements as an Integrated System), you already know these three reports describe one business from different angles. Liquidity analysis sits at the intersection: it starts on the balance sheet, uses income statement flows to compute days metrics, and validates conclusions against operating cash flow from Unit 5.

GAAP (Generally Accepted Accounting Principles, the official U.S. rulebook for financial statements) does not define a single "liquidity score." Instead, it requires clear presentation of current versus noncurrent lines, footnote disclosure of debt maturities, and (for public companies) MD&A (Management Discussion and Analysis, management's narrative on results and risks) discussion of liquidity sources. Analysts and lenders supply the ratios. Your job is to compute them correctly, interpret them in industry context, and never treat one ratio as a complete diagnosis.

Working capital and the operating balance sheet

Working capital is the dollar difference between current assets and current liabilities:

Working capital = Current assets − Current liabilities

Positive working capital means current assets exceed current liabilities. The company has a dollar cushion of short-term resources above short-term claims. Negative working capital means current liabilities exceed current assets. That is not automatically bankruptcy. Some high-turn retailers (certain grocers and e-commerce models) run negative working capital because they collect from customers quickly and pay suppliers slowly, effectively using supplier credit to fund operations. But negative working capital in a manufacturer with 90-day receivables and 60-day inventory is a warning sign, not a strategy.

Working capital is both a level (how many dollars are tied up) and a change (whether the tie-up grew or shrank during the period). A $10 million working capital balance tells you the cushion today. A $3 million increase in working capital during the year tells you the company consumed $3 million of cash to fund receivables, inventory, and prepaid items net of unpaid bills. That consumption appears in the operating section of the statement of cash flows under the indirect method from Unit 5: when AR increases, operating cash falls; when AP increases, operating cash rises.

From Unit 4, Lesson 1 (Cash and Internal Controls), you know cash is the most liquid asset and the one lenders monitor with covenants. From Unit 4, Lesson 2 (Accounts Receivable and Credit Losses), you know AR is not cash until collected, and that days sales outstanding (DSO, average days to collect credit sales) measures collection speed. From Unit 4, Lesson 3 (Inventory and Cost of Goods Sold), you know inventory ties up cash until sold, and that COGS (cost of goods sold, the inventory cost of what was sold) feeds efficiency metrics. Working capital is where those three accounts meet on the balance sheet.

Managers use working capital analysis to answer operational questions. Should we offer customers 45-day terms to win a contract? That decision raises AR and working capital, slowing the cash conversion cycle. Should we pre-buy inventory before a tariff increase? That raises inventory and consumes cash now. Should we stretch supplier payments from 30 to 45 days? That raises AP, reduces working capital, and shortens the cash conversion cycle, but may damage supplier trust. Accounting does not choose the policy. It makes the tradeoffs visible.

Liquidity ratios: current, quick, and cash

Liquidity ratios express the relationship between short-term resources and short-term obligations. They are comparative: 1.5 means something only relative to industry norms, covenant thresholds, and the company's own trend. All three ratios in this lesson use current liabilities as the denominator. The numerators differ in how conservatively they treat inventory and receivables.

Current ratio:

Current ratio = Current assets ÷ Current liabilities

The current ratio is the broadest measure. It includes inventory, prepaids, and all current assets. It answers: "If we liquidated all current assets at book value, how many times could we cover current liabilities?" A ratio of 2.0 means current assets are twice current liabilities. Lenders often like to see at least 1.5 to 2.0 for middle-market borrowers, but acceptable ranges vary by industry.

Quick ratio (also called the acid-test ratio):

Quick ratio = (Cash + Marketable securities + Accounts receivable) ÷ Current liabilities

The quick ratio excludes inventory and most prepaids. It answers: "If we cannot sell inventory tomorrow, can near-cash assets still cover what we owe soon?" This is the ratio many revolving credit agreements use in covenants because inventory is the least liquid major current asset for a manufacturer or distributor.

Cash ratio:

Cash ratio = (Cash + Marketable securities) ÷ Current liabilities

The cash ratio is the strictest. It asks whether the company could pay current liabilities from cash and cash-like investments alone, without collecting receivables. Few operating companies maintain a cash ratio near 1.0; doing so would mean hoarding cash instead of investing in growth. But a collapsing cash ratio while current ratio stays high signals rising dependence on inventory and receivables.

Consider how the three ratios move together when a company builds inventory ahead of a product launch. Cash falls as the company pays suppliers. Inventory rises. AR is unchanged. Current ratio may rise (total current assets up). Quick ratio falls (inventory is excluded). Cash ratio falls sharply. A board member who stops at the current ratio misses the shift toward less liquid assets. A bank officer watching the quick ratio covenant sees the risk first.

From Unit 2 (Recording Transactions), every transaction that moves cash, AR, inventory, or AP changes these ratios. From Unit 3 (Accrual Accounting), revenue recognized before collection raises AR and inflates the current ratio without adding cash. From Unit 5, Lesson 2 (Building the Balance Sheet), you know exactly where each line sits. Liquidity analysis is applied balance-sheet reading, not a separate vocabulary.

Days metrics, the operating cycle, and the cash conversion cycle

Point-in-time ratios answer "can we pay?" Days metrics answer "how long is cash tied up in operations?" They connect the balance sheet to income statement flows and are essential for multi-year trend analysis.

Three building blocks:

Days sales outstanding (DSO):

DSO = (Average AR ÷ Credit sales) × 365

DSO measures how long receivables sit before collection. Use credit sales (sales on account), not total cash sales, when possible. If only total revenue is disclosed, analysts often use revenue as a practical proxy and note the limitation. Use average AR ((beginning AR + ending AR) ÷ 2) because the receivable balance fluctuates during the year.

Days inventory outstanding (DIO):

DIO = (Average inventory ÷ COGS) × 365

DIO measures how long inventory sits before sale. COGS is the flow of cost from the income statement; inventory is the stock on the balance sheet. Average inventory smooths seasonal builds.

Days payables outstanding (DPO):

DPO = (Average AP ÷ COGS) × 365

DPO measures how long the company takes to pay suppliers. Some analysts use purchases instead of COGS when purchase data is available. For merchandisers and manufacturers without separate purchase disclosure, COGS is the standard practical denominator, and you should stay consistent across years when comparing trends.

Operating cycle = DSO + DIO. This is how long cash is tied up from buying inventory through selling and collecting. It does not yet credit supplier payment terms.

Cash conversion cycle (CCC) = DSO + DIO − DPO. This is the net days between cash paid to suppliers and cash collected from customers. A lower CCC is generally better (cash returns faster), but aggressively stretching DPO can damage supplier relationships.

If CCC is 75 days, the company must fund roughly 75 days of operating investment in working capital. For a firm with $40 million in annual COGS, each 10-day improvement in CCC frees roughly $40M × (10 ÷ 365) ≈ $1.1 million in cash. That is why operators obsess over collection calls, inventory turns, and payment terms. The arithmetic converts days into dollars.

The cash conversion cycle also links directly to Unit 5's statement of cash flows. When DSO rises, AR grows on the balance sheet and operating cash flow falls under the indirect method. When DIO rises, inventory growth consumes cash. When DPO rises, AP growth adds back to operating cash. The CCC is a compact summary of those three working capital levers.

Terms with customers and suppliers: the policy levers behind the ratios

Liquidity ratios are outputs. Payment terms are inputs managers control. Net-30 means payment is due 30 days after invoice. 2/10 net-30 means the customer gets a 2% discount if paid within 10 days, otherwise full payment is due in 30 days. Net-60 stretches customer credit. On the supplier side, identical language applies: a manufacturer offered net-45 from a key supplier can shorten the cash conversion cycle by 15 days relative to net-30, holding operations constant.

Customer terms and supplier terms do not move in isolation. A sales team that offers net-90 to win a government contract may improve booked revenue while ballooning AR and DSO. Procurement that negotiates net-60 with suppliers may improve DPO and free cash, but suppliers may raise prices to compensate for slower payment. Treasury must fund the gap. That funding appears as higher short-term debt (hurting liquidity if cash is not available) or as reduced cash (hurting the cash ratio).

From Unit 4, Lesson 2, you learned that AR quality matters as much as AR size. A rising DSO can mean customers are struggling, disputes are unresolved, or the sales team offered looser terms at quarter end to hit targets. From Unit 4, Lesson 3, rising DIO can mean deliberate pre-build ahead of a launch, or slow-moving stock that will require markdowns. Liquidity analysis without qualitative footnotes is incomplete. The ratios tell you where to ask questions.

Credit agreements often encode these levers as covenants: minimum quick ratio, maximum CCC, minimum cash, or restrictions on dividends when liquidity falls. From Unit 1, Lesson 1 (Why Accounting Exists), covenants are why measurement quality matters. A covenant breach can accelerate debt repayment even when operations feel "fine" on a P&L basis.

Seasonal businesses and why year-end snapshots mislead

Seasonal companies break ratio analysis if you read only fiscal year-end balance sheets. A winter sports retailer stocks up in fall and collects cash in January after holiday sales. A agricultural supplier peaks in planting season. A tax software firm peaks in March and April. At fiscal year-end (often December 31), a retailer may show peak inventory and low AR (because holiday sales were collected quickly). Six months later, in July, inventory may be low but cash may be depleted while next season's orders require deposits.

FrostPeak Outfitters (introduced in the second worked example below) illustrates the pattern. Year-end current ratio can look conservative while July quick ratio threatens a covenant. Lenders to seasonal borrowers often require monthly or peak/off-peak covenant tests, not just December 31 compliance. Public companies disclose seasonality in MD&A; you should read it before comparing December ratios to a non-seasonal peer.

Seasonality also affects days metrics. Using December inventory in DIO for a retailer overstates inventory relative to annual COGS flow if December is the peak. Analysts mitigate by averaging beginning and ending balances (standard practice), using trailing twelve-month COGS, or computing ratios on quarterly balance sheets. The lesson's worked examples use average balances because that is the most common textbook approach and matches how you will see estimates in practice when quarterly data is sparse.

When a seasonal firm borrows on a revolving credit facility (revolver, a short-term line of credit the company can draw and repay repeatedly), the borrowing base often depends on eligible AR and inventory, not total current assets. A high current ratio that includes ineligible slow inventory does not help availability. Liquidity analysis for seasonal firms therefore requires knowing which assets the bank actually counts.

Connecting liquidity analysis to Units 1 through 5

This lesson stands on prior units. If any link below feels shaky, revisit that lesson before continuing in Unit 6.

Unit 5, Lesson 3 is the closest articulation partner. When net income is positive but operating cash flow (OCF, cash generated or used by core business activities) is negative, the bridge often runs through working capital: AR and inventory grew faster than AP. The indirect method reconciliation you built for Harper Supply in that lesson is the cash-flow proof of the ratio story you tell here.

Unit 6, Lesson 2 (Profitability and Margin Analysis) asks whether the company earns enough on each sale. This lesson asks whether it can fund operations until cash returns. Unit 6, Lesson 3 (Efficiency and Asset Utilization) extends days metrics to total asset turnover. Unit 6, Lesson 4 (Leverage and Solvency) asks whether debt levels are sustainable. Together, they form a complete analyst toolkit. Start with liquidity because distress shows up in missed payroll and covenant breaches before annual leverage ratios scream.

Atlas Components Inc. is a fictional distributor of industrial fasteners with roughly $30 million in annual revenue. You are advising a regional bank reviewing Atlas's revolving credit line. The bank's covenant requires a quick ratio of at least 1.10 at each quarter end. All dollar figures below are in $000s (thousands).

Part A: Balance sheet snapshots (Years 1 through 3)

Income statement flows (for days metrics):

Atlas reports essentially all sales on credit. Year 3 shows growth, but cash fell while receivables and inventory climbed. Short-term debt rose to fund the gap.

Check (Year 3 current assets): 800 + 250 + 5,200 + 3,800 + 220 = 10,270 ✓

Check (Year 3 current liabilities): 2,400 + 850 + 1,800 + 420 = 5,470 ✓

Part B: Liquidity ratios and three-year trend

Year 3:

• Working capital = 10,270 − 5,470 = $4,800k
• Current ratio = 10,270 ÷ 5,470 = 1.88
• Quick ratio = (800 + 250 + 5,200) ÷ 5,470 = 6,250 ÷ 5,470 = 1.14
• Cash ratio = (800 + 250) ÷ 5,470 = 1,050 ÷ 5,470 = 0.19

Year 2:

• Working capital = 9,400 − 4,800 = $4,600k
• Current ratio = 9,400 ÷ 4,800 = 1.96
• Quick ratio = (1,200 + 300 + 4,500) ÷ 4,800 = 6,000 ÷ 4,800 = 1.25
• Cash ratio = (1,200 + 300) ÷ 4,800 = 1,500 ÷ 4,800 = 0.31

Year 1:

• Working capital = 7,950 − 4,150 = $3,800k
• Current ratio = 7,950 ÷ 4,150 = 1.92
• Quick ratio = (900 + 200 + 3,800) ÷ 4,150 = 4,900 ÷ 4,150 = 1.18
• Cash ratio = (900 + 200) ÷ 4,150 = 1,100 ÷ 4,150 = 0.27

The pattern is a classic "headline vs substance" story. Working capital and the current ratio look adequate in Year 3. The quick ratio still clears the 1.10 covenant, but headroom shrank from 0.15 (1.25 − 1.10) to 0.04 (1.14 − 1.10). The cash ratio fell from 0.31 to 0.19, meaning Atlas now depends heavily on collecting AR to pay bills. Inventory rose from 2,900 to 3,800 ($900k), while cash fell $400k. Growth consumed cash even as the P&L likely shows higher revenue.

Inventory as a share of current assets: Year 1 = 2,900 ÷ 7,950 = 36.5%; Year 3 = 3,800 ÷ 10,270 = 37.0%. Roughly stable percentage, but larger absolute dollars at risk if fasteners go obsolete.

Part C: Operating cycle and cash conversion cycle (Year 2 and Year 3)

Use average balances between years for days metrics.

Year 2 averages (between Year 1 and Year 2):

• Average AR = (4,500 + 3,800) ÷ 2 = 4,150
• Average inventory = (3,200 + 2,900) ÷ 2 = 3,050
• Average AP = (2,100 + 1,900) ÷ 2 = 2,000

Year 2 days:

• DSO = (4,150 ÷ 28,000) × 365 = 54.1 days
• DIO = (3,050 ÷ 19,000) × 365 = 58.6 days
• DPO = (2,000 ÷ 19,000) × 365 = 38.4 days
• Operating cycle = 54.1 + 58.6 = 112.7 days
• CCC = 54.1 + 58.6 − 38.4 = 74.3 days

Year 3 averages (between Year 2 and Year 3):

• Average AR = (5,200 + 4,500) ÷ 2 = 4,850
• Average inventory = (3,800 + 3,200) ÷ 2 = 3,500
• Average AP = (2,400 + 2,100) ÷ 2 = 2,250

Year 3 days:

• DSO = (4,850 ÷ 31,200) × 365 = 56.7 days
• DIO = (3,500 ÷ 20,500) × 365 = 62.3 days
• DPO = (2,250 ÷ 20,500) × 365 = 40.1 days
• Operating cycle = 56.7 + 62.3 = 119.0 days
• CCC = 56.7 + 62.3 − 40.1 = 78.9 days

Cash tied in cycle (Year 3): CCC of 78.9 days on $20.5M COGS ≈ $20,500 × (78.9 ÷ 365) ≈ $4.4 million of operating investment in working capital at a point in time, before considering other current items.

Sensitivity: If Atlas improves DSO by 5 days without changing sales, cash freed ≈ $31,200 × (5 ÷ 365) ≈ $428k. If it reduces DIO by 5 days, cash freed ≈ $20,500 × (5 ÷ 365) ≈ $281k. Collection and inventory together matter more than stretching payables by 1–2 days.

Check (Year 2 CCC): 54.1 + 58.6 − 38.4 = 74.3 ✓

Check (Year 3 CCC): 56.7 + 62.3 − 40.1 = 78.9 ✓

Part D: Managerial read and covenant stress test

Bank officer view: Atlas remains covenant-compliant on the quick ratio (1.14 vs 1.10 minimum), but the trend is unfavorable. Another year like Year 3 could breach without a dramatic event. The officer should request quarterly AR aging, inventory slow-mover reports, and a borrowing-base certificate showing eligible collateral.

CFO action list: (1) Tighten credit terms or escalate collections on accounts over 60 days. (2) Reduce purchase volumes on slow SKUs to pull DIO down. (3) Avoid further short-term debt increases unless OCF recovers. (4) Present the board a bridge from net income to operating cash highlighting working capital drag, using the Unit 5 indirect method format.

Covenant stress (hypothetical Q4 event): Suppose Atlas burns $600k cash paying down short-term debt (cash falls to $200k) while AR rises $500k from quarter-end billings and inventory is flat. New quick assets = 200 + 250 + 5,700 = 6,150 (using AR of 5,700). Quick ratio = 6,150 ÷ 5,470 = 1.12. Still compliant, but barely. If instead $400k of the receivable buildup proves disputed and ineligible under the revolver, the bank's borrowing base shrinks even while book quick ratio looks similar. Liquidity is part accounting, part legal agreement.

Board question: "Revenue grew 11% from Year 2 to Year 3. Why did cash fall 33%?" The answer lives in working capital: receivables rose $700k, inventory $600k, and short-term debt funded only part of the gap. This is the integrated story Units 1 through 5 prepare you to tell.

FrostPeak Outfitters is a fictional regional retailer of winter sports equipment. Roughly 65% of annual revenue occurs in October through December. Fiscal year ends December 31. You are the CFO preparing a February lender presentation. The revolver covenant requires quick ratio ≥ 1.00 at each month end. Dollar figures in $000s.

Part A: Two balance sheet snapshots (July 31 vs December 31, Year 2)

Year 2 annual flows: Credit sales $18,000; COGS $11,000. December inventory is peak pre-season carryover plus early spring goods. July inventory is low but building for fall.

Check (Dec 31 CA): 1,850 + 100 + 2,400 + 8,900 + 220 = 13,470 ✓

Check (Jul 31 CL): 3,600 + 1,200 + 2,100 = 6,900 ✓

Part B: Ratio comparison across seasons

December 31 (fiscal year-end):

• Working capital = 13,470 − 6,450 = $7,020k
• Current ratio = 13,470 ÷ 6,450 = 2.09
• Quick ratio = (1,850 + 100 + 2,400) ÷ 6,450 = 4,350 ÷ 6,450 = 0.67
• Cash ratio = (1,850 + 100) ÷ 6,450 = 0.30

July 31 (off-season):

• Working capital = 7,900 − 6,900 = $1,000k
• Current ratio = 7,900 ÷ 6,900 = 1.14
• Quick ratio = (420 + 0 + 1,100) ÷ 6,900 = 1,520 ÷ 6,900 = 0.22
• Cash ratio = 420 ÷ 6,900 = 0.06

December looks liquid on the current ratio (2.09) because peak inventory inflates current assets. The quick ratio is only 0.67 at year-end and 0.22 in July. Both fail the 1.00 covenant if tested on quick ratio alone. FrostPeak's bank historically used a seasonal covenant grid: quick ratio minimum 0.85 in December, 1.00 in July. The CFO must confirm the exact agreement language. Year-end compliance on a relaxed seasonal grid does not mean summer compliance.

The cash ratio of 0.06 in July means cash covers only 6% of current liabilities. FrostPeak relies on revolver availability and rapid fall inventory sell-through. That is normal for seasonal retail if the line is sized correctly. It is dangerous if spring sales disappoint.

Part C: CCC at fiscal year-end vs operating cycle intuition

Using December 31 Year 2 and prior year December for averages:

• Average AR = (2,400 + 2,100) ÷ 2 = 2,250 (assume Year 1 Dec AR was 2,100)
• Average inventory = (8,900 + 7,400) ÷ 2 = 8,150 (assume Year 1 Dec inventory 7,400)
• Average AP = (4,200 + 3,800) ÷ 2 = 4,000

Days at fiscal year-end (Year 2):

• DSO = (2,250 ÷ 18,000) × 365 = 45.6 days
• DIO = (8,150 ÷ 11,000) × 365 = 270.3 days
• DPO = (4,000 ÷ 11,000) × 365 = 132.7 days
• Operating cycle = 45.6 + 270.3 = 315.9 days
• CCC = 45.6 + 270.3 − 132.7 = 183.2 days

The DIO looks extreme because December inventory is peak stock relative to smooth annual COGS. This is the seasonality problem: one annual COGS flow against a peak inventory snapshot overstates days. FrostPeak's internal management uses trailing three-month COGS for off-season reviews. External analysts still use annual averages but read MD&A for seasonality.

Despite high DIO, FrostPeak collects quickly in January from holiday sales (cash rises from $1,850k at Dec 31 to $3,200k by Jan 31 in internal flash reports). The operating cycle concept (DSO + DIO) describes cash tied up before collection; for retailers, much of that cycle completes in January even when December inventory is high.

Check (CCC): 45.6 + 270.3 − 132.7 = 183.2 ✓

Part D: Articulation to the statement of cash flows (Year 2)

FrostPeak Year 2 simplified cash flow effects:

Suppose Year 2 net income was $900k and depreciation $350k. A rough indirect operating cash computation:

• Start with net income: $900k
• Add depreciation: $350k
• Subtract AR increase: $300k
• Subtract inventory increase: $1,500k
• Add AP increase: $400k
• Approximate OCF ≈ 900 + 350 − 300 − 1,500 + 400 = −$150k

OCF is negative despite profitable sales because fall inventory purchases consumed cash before holiday collections arrived. The December balance sheet still looks "fat" on current assets. The cash flow statement explains the timing. This is exactly the integration Unit 5 teaches: net income is not cash, and working capital bridges the gap.

Lender presentation line: "We are seasonal. July quick ratio is 0.22; December is 0.67. Our covenant grid allows December 0.85. We peak revolver at $2.1M in July and expect paydown to $0.8M by year-end as inventory sells. Here is weekly cash forecast through March." That narrative beats handing over a single current ratio.

Harbor Mechanical Supply (fictional) distributes HVAC parts. All figures in $000s.

December 31, Year 2 balance sheet (current section only):

Year 2 income statement flows: Credit sales $22,400; COGS $15,600.

Tasks:

1. Compute working capital, current ratio, quick ratio, and cash ratio for Year 2 and Year 1.
2. Compute DSO, DIO, DPO, and CCC for Year 2 using average balances.
3. Explain in prose which ratio moved most unfavorably and what a credit analyst should ask management.

Solution

Year 2 liquidity:

• Working capital = 6,440 − 3,440 = $3,000k
• Current ratio = 6,440 ÷ 3,440 = 1.87
• Quick ratio = (640 + 160 + 3,100) ÷ 3,440 = 3,900 ÷ 3,440 = 1.13
• Cash ratio = (640 + 160) ÷ 3,440 = 800 ÷ 3,440 = 0.23

Year 1 liquidity:

• Working capital = 5,800 − 3,080 = $2,720k
• Current ratio = 5,800 ÷ 3,080 = 1.88
• Quick ratio = (880 + 140 + 2,600) ÷ 3,080 = 3,620 ÷ 3,080 = 1.18
• Cash ratio = (880 + 140) ÷ 3,080 = 1,020 ÷ 3,080 = 0.33

Year 2 days metrics (averages):

• Average AR = (3,100 + 2,600) ÷ 2 = 2,850

• Average inventory = (2,450 + 2,100) ÷ 2 = 2,275

• Average AP = (1,720 + 1,550) ÷ 2 = 1,635

• DSO = (2,850 ÷ 22,400) × 365 = 46.4 days

• DIO = (2,275 ÷ 15,600) × 365 = 53.2 days

• DPO = (1,635 ÷ 15,600) × 365 = 38.2 days

• CCC = 46.4 + 53.2 − 38.2 = 61.4 days

Check (Year 2 quick assets): 640 + 160 + 3,100 = 3,900 ✓

Check (CCC): 46.4 + 53.2 − 38.2 = 61.4 ✓

Analyst narrative: The current ratio is nearly flat (1.88 to 1.87), which could look stable in a cursory review. The cash ratio fell the most in relative terms (0.33 to 0.23, a 30% decline in coverage from cash alone). Cash fell $240k while AR rose $500k and inventory $350k. The company traded cash for receivables and inventory to support growth. The quick ratio slipped from 1.18 to 1.13, still above 1.0 but less cushion. A credit analyst should request AR aging (percent over 60 days), inventory slow-mover detail, and a quarter-by-quarter quick ratio trend. The analyst should also ask whether short-term debt rose ($950k to $1,100k) to fund working capital and whether OCF in the cash flow statement was negative after working capital adjustments, as Unit 5 would show.

NovaByte Systems (fictional SaaS company) shows the following current items at December 31, Year 1 (no inventory; $000s):

Tasks:

1. Compute current assets, current liabilities, working capital, current ratio, quick ratio, and cash ratio.
2. NovaByte's bank covenant defines quick assets as cash, marketable securities, and AR only (prepaids excluded). Is NovaByte above a 1.50 quick covenant?
3. Explain why deferred revenue (customer prepayments for service not yet delivered, a liability from Unit 3 and Unit 5) matters for liquidity even though it is not in the CCC formulas above.

Solution

Classification:

• Current assets = 2,100 + 400 + 1,800 + 150 = $4,450k
• Current liabilities = 900 + 650 + 1,400 + 0 = $2,950k

Ratios:

• Working capital = 4,450 − 2,950 = $1,500k
• Current ratio = 4,450 ÷ 2,950 = 1.51
• Quick ratio = (2,100 + 400 + 1,800) ÷ 2,950 = 4,300 ÷ 2,950 = 1.46
• Cash ratio = (2,100 + 400) ÷ 2,950 = 2,500 ÷ 2,950 = 0.85

Check (current assets): 2,100 + 400 + 1,800 + 150 = 4,450 ✓

Check (current liabilities): 900 + 650 + 1,400 = 2,950 ✓

Covenant test (bank definition): Quick assets per bank = 2,100 + 400 + 1,800 = 4,300. Quick ratio = 4,300 ÷ 2,950 = 1.46. NovaByte is below the 1.50 covenant by 0.04. The company looks comfortable on cash ratio (0.85) because it holds substantial cash, but the covenant failure is driven by large deferred revenue inflating current liabilities without a matching cash obligation today. The cash was collected in prior periods when customers prepaid.

Deferred revenue and liquidity: Deferred revenue is a non-cash liability in the sense that NovaByte already received the cash when customers prepaid annual subscriptions. The obligation is to deliver software service over time, not to refund cash immediately. For liquidity, deferred revenue is "good" funding: it increases current liabilities (lowering ratios) while cash is already in the bank from earlier collections. A beginner who treats all current liabilities as near-term cash demands will misread SaaS firms. NovaByte's CCC formulas focused on AR, inventory, and AP because it has no inventory and COGS is not the right frame for subscription economics. Liquidity analysis for SaaS must combine quick ratios with deferred revenue, burn rate, and OCF from Unit 5. The lesson's distributor examples map cleanly to AR/inventory/AP cycles; software firms require you to read liability composition, not only asset headlines.

Key takeaways

• Liquidity is near-term payment ability; solvency is long-term obligation capacity. Use current, quick, and cash ratios together, not alone.
• Working capital and the cash conversion cycle translate balance sheet snapshots into dollars and days tied up in operations.
• Trends and seasonality matter: a stable year-end current ratio can hide a deteriorating quick ratio or a July covenant breach.
• DSO, DIO, and DPO link to Unit 4 accounts and Unit 5 OCF adjustments; ratios without cash flow articulation are incomplete.
• Read liability composition (deferred revenue, revolver draws, covenant definitions) before declaring a company "liquid."

1. Pull the most recent 10-K (annual SEC filing with audited financials) for a public retailer and a public manufacturer. Compute current, quick, and cash ratios for two years and note seasonality language in MD&A.
2. For a company you follow, estimate CCC components using average balances. Which lever (collections, inventory, payables) would free the most cash if improved by five days?
3. Continue to Lesson 2: Profitability and Margin Analysis.