Adjusting Entries

Routine entries miss period-end reality

Picture a regional lender reviewing January financials for a warehouse operator on February 5. Cash looks healthy. Revenue is positive. The unadjusted trial balance (the listing of all general ledger account balances after routine postings but before period-end corrections) balances perfectly: total debits equal total credits. The controller attaches a clean spreadsheet and asks for a line-of-credit increase.

The lender's credit analyst asks one follow-up question: "Did you record January wages earned by employees but paid in February?" The controller pauses. "We recorded payroll when it cleared the bank." The analyst asks about insurance paid in advance, rent collected for future months, and interest accruing on the term loan. Each answer reveals the same pattern: the books reflect cash timing and routine transactions, not the full accrual accounting picture you studied in Unit 3, Lesson 1 (Cash Accounting versus Accrual Accounting).

That gap is not a bookkeeping footnote. It is a measurement problem. Adjusting entries are the journal entries recorded at the end of an accounting period to align the ledger with accrual accounting rules before anyone prepares the income statement (profit and loss statement, also called the P&L) or balance sheet. They implement the revenue and expense principles from Lesson 2 (Revenue Recognition) and Lesson 3 (Expense Recognition and Matching). They turn a mechanically balanced ledger into statements that describe economic performance for the period, not merely bank activity for the period.

Managers feel the stakes when adjustments are skipped or done carelessly. A CEO (chief executive officer) who approves bonuses based on unadjusted January profit may overstate results by tens of thousands of dollars because unpaid wages and depreciation never hit the P&L. A covenant (a financial promise in a loan contract, such as a minimum net income or leverage ratio) tested on unadjusted numbers can look compliant when the adjusted numbers breach. An investor comparing month-over-month margins sees a false jump when a large prepaid expense was never amortized. Adjusting entries are where accrual theory becomes period-end discipline.

This lesson teaches you what adjusting entries are, why they never touch cash in pure accrual cases, how the four classic types map to balance sheet and income statement accounts, how to build a month-end close package, how to move from an unadjusted trial balance to an adjusted trial balance, and how to document support so auditors and lenders trust the output. You will work two full close packages with reconciled numbers, study common beginner errors, and practice on your own fact patterns.

Where adjusting entries sit in the accounting cycle

In Unit 2 (Recording Transactions), you learned the mechanical chain that produces a trial balance. Journal entries (Lesson 3) capture transactions. Posting (Lesson 4) updates each general ledger (GL) (the master set of accounts that accumulates debits and credits) account. Preparing an Unadjusted Trial Balance (Lesson 5) lists every account's ending balance and verifies that debits equal credits.

That unadjusted trial balance is a necessary checkpoint, not a finish line. As Unit 2 Lesson 5 explained, a balanced trial balance proves double-entry equality but does not prove that revenue and expenses reflect the correct period. Insurance paid in January for six months still sits entirely in prepaid insurance (an asset) until you expense the portion that expired. Wages earned in the last days of January may not appear until February payroll runs. Cash collected for services not yet delivered inflates cash while understating the unearned revenue liability and understating true earned revenue.

Adjusting entries are step four in the period-close sequence:

1. Record routine journal entries during the period.
2. Post to the GL.
3. Prepare the unadjusted trial balance (UTB).
4. Analyze accounts, gather support, and record adjusting entries.
5. Post adjustments and prepare the adjusted trial balance (ATB).
6. Build the P&L and balance sheet from the ATB.
7. In Lesson 5 (Closing the Books), close temporary accounts to retained earnings.

The adjusted trial balance is the direct input to external-facing statements. If you can read an ATB, you can see which accounts feed revenue, which feed operating expenses, and which remain on the balance sheet. Controllers often say "statements come out of the adjusted TB," and that is literally true in many close processes: the software maps ATB balances into statement lines.

A manager who only reviews the P&L without understanding adjustments is trusting someone else's judgment about period boundaries. When your finance team extends the close by three days, they are often fighting cutoff issues: Did the last shipment leave the dock in December or January? Were consulting hours billed through month-end? Adjusting entries encode those judgments in numbers.

The four classic types of adjusting entries

Unit 3 Lessons 2 and 3 taught the principles. Adjusting entries are the mechanical application at month-end. Nearly every service business close package includes some combination of four types: prepaid expenses (a deferral), accrued expenses (an accrual), unearned revenue (a deferral), and depreciation or accrued interest (systematic allocation or accrual).

Prepaid expenses (deferral of expense). The company paid cash early and recorded an asset: prepaid insurance, prepaid rent, prepaid software subscription. Each period, part of the benefit expires. The adjustment moves that portion from the asset to expense. Economically, the company consumed coverage, occupancy, or access even though cash left earlier. The entry never touches cash again until the next payment. It recognizes expense in the period benefited, which is the matching principle from Lesson 3.

Accrued expenses (accrual of expense). The company incurred cost before paying cash: wages earned but unpaid, utilities consumed but not yet billed, interest on debt between payment dates. The adjustment records expense and a liability (wages payable, interest payable, utilities payable). Cash will move later. Skipping this adjustment understates expense and liabilities and overstates net income.

Unearned revenue (deferral of revenue). The company collected cash (or billed in advance) before earning it. Lesson 2 described deferred revenue (cash or billings received for performance not yet delivered) as a liability until obligations are satisfied. The adjustment reduces unearned revenue and recognizes earned revenue for the portion delivered in the period. This is why a SaaS company can have strong January cash and modest January revenue: annual prepayments sit in deferred revenue until recognized ratably.

Depreciation and accrued interest (allocation and accrual). Depreciation (systematic allocation of a long-lived asset's cost over its useful life) spreads equipment or building cost across periods. It is an estimate, not a cash event. Accrued interest records interest expense for the days the company used borrowed money since the last interest payment. Both connect the balance sheet (accumulated depreciation, interest payable) to the P&L (depreciation expense, interest expense).

Notice what is missing from every pure adjusting entry in the table: Cash. If an adjusting entry debits or credits cash for a classic accrual or deferral, something is wrong unless you are correcting an error from an earlier routine entry. Beginners sometimes try to "adjust cash" to match the bank statement when the real issue is unpaid wages or unearned rent. Cash reconciliation is a separate control. Adjusting entries align accrual recognition.

The four types pair naturally with the revenue and expense lessons. Revenue recognition (Lesson 2) asks whether performance obligations were satisfied. Unearned revenue adjustments answer that question in dollars for the period. Expense recognition (Lesson 3) asks whether costs were incurred or benefits consumed. Prepaid and accrued expense adjustments answer that question. Depreciation is the systematic form of matching for property, plant, and equipment (PP&E) (long-lived tangible operating assets).

How to analyze an account and build the entry

Adjusting entries follow a repeatable workflow. Accountants call it "account analysis": pick a balance sheet account, ask what portion still belongs on the balance sheet at period-end, and move the difference to the income statement.

For prepaid assets, the question is: how much benefit remains unused? If six months of insurance were prepaid and one month passed, five-sixths stay prepaid and one-sixth becomes expense. The math is usually straight-line unless the contract specifies otherwise.

For accrued expenses, the question is: what did we owe at midnight on the last day of the period that we have not yet recorded? Payroll systems may lag. Utility meters are read on odd cycles. Interest accrues daily on notes. Support comes from timesheets, vendor accrual worksheets, and loan amortization schedules.

For unearned revenue, the question is: how much of the obligation did we fulfill? A three-month sublease collected upfront may earn one month per month. A annual software subscription earns one-twelfth per month unless usage-based terms say otherwise.

For depreciation, the question is: how much cost do we allocate this period? Straight-line (SL) depreciation spreads cost evenly: (cost minus salvage value) divided by useful life in periods. Policies live in footnotes; changes affect comparability.

For accrued interest, the question is: how much interest accumulated since the last payment date? Simple monthly accrual: principal times annual rate divided by twelve for a full month, prorated for partial months when needed.

Each adjusting entry hits at least one income statement account and at least one balance sheet account. That simultaneous hit is why adjustments change net income and balance sheet composition together. Depreciation reduces net income and reduces net PP&E. Accrued wages reduce net income and increase liabilities. Earned rent increases net income and reduces deferred revenue.

Document support matters as much as the debit and credit. Auditors ask for the insurance policy schedule, the depreciation register, the lease amortization of deferred revenue, and payroll accrual calculations. A lender doing diligence on a small company may request the month-end adjustment memo. If support is thin, the numbers look arbitrary. Managers should insist on a standard close checklist so adjustments are repeatable, not reinvented under deadline pressure each month.

From unadjusted to adjusted trial balance

The adjusted trial balance is the same format as the unadjusted version: account names, debit column, credit column, totals that must agree. Only the balances change. After you record and post adjusting entries, you re-list every account. Revenue and expense balances now include adjustment amounts. Balance sheet accounts reflect current assets, current liabilities, and updated contra-assets.

Walk through the logic on one account. Prepaid insurance sits at $6,000 on the UTB because the company debited prepaid and credited cash when the policy was purchased in January. The adjustment credits prepaid $1,000 and debits insurance expense $1,000. The ATB shows prepaid insurance $5,000 in the debit column and insurance expense $1,000 in the debit column. Total debits and credits still match because every adjusting entry balances.

The ATB is where you verify that the period's economics are embedded before statement formatting. Sum all revenue accounts (credit balances). Sum all expense accounts (debit balances). The difference is net income for the period, which will flow to retained earnings through closing entries in Lesson 5. Sum asset, liability, and equity accounts to preview the balance sheet. If equipment is shown gross at $48,000 and accumulated depreciation at $1,000, net PP&E is $47,000.

A common software workflow hides the ATB because statements generate automatically. As a manager learning the language, you should still know the bridge exists. When a controller says "January net income is $10,000 after adjustments," you should be able to ask which entries moved the number from the unadjusted picture. That question separates oversight from blind trust.

The adjusted trial balance does not replace judgment about estimates. Useful life for depreciation, variable consideration in revenue contracts, and bad debt expectations can all require adjusting entries with uncertainty. Accounting records the best estimate with documentation. Managers disclose when changes in estimates are material.

Harborview Event Rentals leases warehouse space and equipment for corporate events. January was its first full month operating with a term loan and prepaid contracts. The controller prepared an unadjusted trial balance on January 31 after routine journal entries for cash collections, cash payments, credit sales, and the initial recording of insurance, equipment, debt, and unearned rent. The UTB balances, but January profit is misleading until adjustments are posted.

This example includes all four classic adjustment types: prepaid insurance, accrued wages, unearned rent revenue, depreciation, and accrued interest on debt.

Part A: Fact pattern and unadjusted trial balance

Key facts at January 31:

• On January 1, Harborview paid $6,000 cash for six months of liability insurance coverage beginning that day. The routine entry debited prepaid insurance and credited cash. No monthly amortization was recorded yet.
• Employees earned $12,000 in wages for the final week of January. Payroll will pay them on February 5. Through January 24, wage expense of $19,000 was recorded when cash payroll cleared.
• Harborview purchased equipment on January 1 for $48,000 cash. Management estimates a four-year useful life with no salvage value and uses straight-line depreciation.
• Harborview borrowed $100,000 on a note at 6% annual interest. Interest is payable quarterly; the last interest payment was December 31 of the prior year. January interest has not been recorded.
• On January 5, Harborview collected $9,000 cash for a three-month warehouse sublease beginning January 5. The routine entry credited unearned rent revenue. One month of the sublease has been earned by January 31.

Unadjusted trial balance, January 31 (excerpt of active accounts):

Check: Total debits $220,500 = Total credits $220,500 ✓

Unadjusted net income embedded in the UTB: Service and rent revenue $47,000 minus expenses $25,500 = $21,500. That $21,500 ignores one month of insurance consumption, $12,000 of wages, $1,000 of depreciation, $500 of interest, and $3,000 of earned sublease revenue that is still sitting in unearned rent.

Part B: Adjusting entries (the close package)

Entry 1: Prepaid insurance (one month expired)

Six months of coverage cost $6,000, so one month is $6,000 ÷ 6 = $1,000.

Economic read: Harborview consumed one month of coverage in January even though cash left on January 1.

Entry 2: Accrued wages (incurred but unpaid)

Economic read: Employees performed work in January; the obligation exists at month-end even though cash pays in February.

Entry 3: Depreciation (straight-line, one month)

Useful life four years = 48 months. Monthly depreciation = $48,000 ÷ 48 = $1,000.

Economic read: Equipment contributes to event operations over time; January bears a portion of the capital cost.

Entry 4: Accrued interest (one month)

Monthly interest = $100,000 × 6% ÷ 12 = $500.

Economic read: Harborview used the lender's money all January; interest expense accrues even between quarterly cash payments.

Entry 5: Unearned rent earned (one month of three)

Total deferred rent $9,000 for three months → $3,000 earned per month.

Economic read: Harborview delivered one month of sublease access; that portion is no longer a liability to the tenant.

Check each entry: debits = credits ✓ for all five entries.

Summary of adjustment impacts:

Part C: Adjusted trial balance

After posting the five entries, Harborview's adjusted trial balance includes new accounts (insurance expense, wages payable, depreciation expense, accumulated depreciation, interest expense, interest payable) and updated balances:

Check: Total debits $234,000 = Total credits $234,000 ✓

Adjusted January net income: Total revenue $50,000 ($35,000 + $15,000) minus total expenses $40,000 ($31,000 + $4,000 + $2,500 + $1,000 + $1,000 + $500) = $10,000.

Compare to unadjusted $21,500. The $11,500 difference equals the net income effect in the summary table. Statements built from this ATB would show lower profit but a more honest view of obligations: $12,500 of additional payables (wages and interest), $6,000 still deferred in unearned rent, and equipment shown net at $47,000.

Part D: Managerial read

The board should not bonus management on $21,500 January profit. The adjusted $10,000 reflects wages actually earned and the cost of capital equipment and debt. Cash of $126,000 looks strong partly because $9,000 of sublease cash is not fully earned and because wages have not left the bank yet. A lender calculating EBITDA (earnings before interest, taxes, depreciation, and amortization, a rough measure of operating cash generation) still wants to see interest and depreciation in GAAP (Generally Accepted Accounting Principles, the U.S. financial reporting rulebook) results, not stripped out without explanation.

Harborview's controller should attach to the close: insurance policy schedule, depreciation register, loan interest calculation, payroll accrual worksheet, and sublease straight-line revenue memo. If the company later restates January because someone capitalized wages that should have been expensed, lender trust erodes faster than the cash saved in February payroll timing.

ClearPath Analytics sells annual data subscriptions to mid-size retailers. December is its fiscal year-end. The fact pattern differs from Harborview: revenue deferrals dominate, bonuses accrue, and a partial-month interest accrual applies to a line of credit opened mid-quarter. The mechanics stay the same; the mix of adjustments reflects the business model you saw in Lesson 2's SaaS discussion.

Part A: Setup

Selected facts at December 31:

• On October 1, ClearPath paid $12,000 cash for a one-year software license for internal analytics tools. The original entry debited prepaid software and credited cash.
• Sales team earned year-end bonuses of $18,000 based on contracts signed. Bonuses pay on January 15. No bonus accrual exists yet.
• On November 1, a customer paid $24,000 cash for a two-year platform subscription. ClearPath credited deferred subscription revenue. The company recognizes revenue ratably over the contract life.
• Office equipment purchased January 1 for $36,000 is depreciated straight-line over three years with no salvage value.
• On December 1, ClearPath drew $60,000 on a line of credit at 8% annual interest. No interest payment is due until March 1. December has one full month of interest.

Unadjusted trial balance excerpts, December 31:

Check: Total debits $763,000 = Total credits $763,000 ✓

Part B: Adjusting entries

Entry 1: Prepaid software (three months expired Oct–Dec)

License term 12 months. Expense for three months = $12,000 ÷ 12 × 3 = $3,000.

Entry 2: Accrued bonuses

Entry 3: Deferred subscription revenue earned (two months Nov–Dec)

Contract is 24 months. Monthly revenue = $24,000 ÷ 24 = $1,000. Two months earned = $2,000.

Entry 4: Depreciation (one month)

Annual depreciation = $36,000 ÷ 3 = $12,000. Monthly = $12,000 ÷ 12 = $1,000.

Entry 5: Accrued interest on line of credit (December)

Monthly interest = $60,000 × 8% ÷ 12 = $400.

Check: Each entry balances ✓

Part C: Adjusted trial balance and net income bridge

Check: Total debits $783,400 = Total credits $783,400 ✓

Unadjusted revenue and expense from excerpts implied calendar-year net income before adjustments of $310,000 minus $505,000 = ($195,000) loss when including only salaries and marketing shown. After adjustments, expenses increase by $22,400 ($3,000 + $18,000 + $1,000 + $400) and revenue increases by $2,000, widening the loss by $20,400 on those lines. The ATB is the authoritative input before closing entries reclassify net results to retained earnings in Lesson 5.

Part D: Investor and operator takeaway

ClearPath's cash balance of $210,000 includes $24,000 of subscription cash not yet earned. The adjusted deferred balance of $22,000 reminds investors that future service obligations remain. Bonus accrual aligns December expense with contracts signed in December even though cash pays in January. Skipping bonus or deferred revenue adjustments would flatter year-end results and create a January hangover when expenses hit without matching revenue.

An operator comparing annual recurring revenue (ARR) (annualized value of active subscriptions) to GAAP revenue should expect gaps when customers prepay. Lesson 2's warning applies: bookings and billings are activity; revenue is earned portion. Adjusting entries are where that distinction becomes ledger fact.

Ridgeline Consulting closes books on March 31. The unadjusted trial balance includes the following relevant balances:

Additional facts:

1. A physical count on March 31 shows $4,800 of supplies still on hand. The supplies account balance has not been adjusted all quarter.
2. Ridgeline paid $18,000 on January 1 for six months of office rent through June 30. No rent expense has been recorded from the prepaid.
3. Employees earned $6,500 in salaries the last three days of March; payment date is April 4.
4. Ridgeline collected $15,000 on February 1 for a five-month retainer beginning February 1. No revenue has been recognized from the retainer yet.
5. Office equipment depreciates straight-line over five years with no salvage value.
6. The note carries 5% annual interest; the last interest payment was December 31. March interest has not been recorded.

Tasks:

1. Prepare all March 31 adjusting journal entries with dollar amounts.
2. Calculate adjusted March net income from the revenue and expense effect of your entries (start from unadjusted consulting revenue and the expenses listed).
3. Explain in a short paragraph why Ridgeline's cash balance of $44,000 is not a good proxy for March profit.

Solution

Step 1: Adjusting entries

(1) Supplies used

Supplies used = $7,000 on books − $4,800 on hand = $2,200.

(2) Prepaid rent (three months Jan–Mar)

Six months prepaid $18,000 → $3,000 per month. Three months expired = $9,000.

(3) Accrued salaries

(4) Earned consulting revenue from retainer (two months Feb–Mar)

Five-month retainer $15,000 → $3,000 per month. Two months earned = $6,000.

(5) Depreciation (one month)

Annual depreciation = $30,000 ÷ 5 = $6,000. Monthly = $6,000 ÷ 12 = $500.

(6) Accrued interest (one month)

Monthly interest = $50,000 × 5% ÷ 12 = $208.33. Round to $208 for simplicity, or keep $208.33 if your policy allows cents. We use $208.33 here.

Check: Each entry debits = credits ✓

Step 2: Adjusted net income bridge

Unadjusted revenue: Consulting revenue $68,000.

Unadjusted expenses: Salaries $52,000 + other expenses $21,000 = $73,000.

Unadjusted net income = $68,000 − $73,000 = ($5,000) loss.

Adjustment effects:

Adjusted net income = ($5,000) + $6,000 − $18,408.33 = ($17,408.33) loss.

Check: Net income decreased by $12,408.33 versus unadjusted, which equals $18,408.33 additional expense minus $6,000 additional revenue ✓

Step 3: Why cash is not a good profit proxy

Ridgeline's $44,000 cash balance mixes timing effects that accrual adjustments strip out. The company collected $15,000 in February for future consulting months, so much of that cash is still unearned at March 31 even after recognizing $6,000. It prepaid $18,000 of rent in January while only $9,000 of benefit belonged to January through March. March salaries of $6,500 were earned but not paid, so cash did not fall yet even though expense should rise. Supplies purchased earlier left the bank when bought, but only $2,200 was consumed in March. A manager judging March performance from the bank balance would miss liabilities building and revenue obligations still owed to clients.

Conceptual cutoff and error detection. For each scenario below, state (a) whether an adjusting entry is required at month-end, (b) which of the four classic types applies, and (c) the debit and credit accounts without amounts.

1. On March 28, Ridgeline signed a new client and collected $10,000 cash for April-only consulting work. The bookkeeper debited cash and credited consulting revenue on March 28.
2. On March 15, Ridgeline paid $4,800 for a 12-month insurance policy and debited prepaid insurance.
3. On March 31, Ridgeline's bookkeeper recorded $2,000 of electricity expense by debiting utilities expense and crediting cash, but the utility bill will not be paid until April 10.

Solution

Scenario 1

(a) Yes, an adjusting entry is required. (b) Type: unearned revenue (deferral of revenue). The March 28 entry recognized revenue too early for GAAP purposes because April work has not been performed. (c) Correcting adjustment at March 31: debit consulting revenue, credit unearned consulting revenue (for the portion not earned in March). In practice, the original entry should have been debit cash, credit unearned revenue; the month-end adjustment would recognize only earned amounts if any March performance occurred. Here, with April-only work, the full $10,000 should sit in unearned revenue at March 31.

This scenario illustrates a cutoff error in routine entries, fixed with an adjusting entry so the ATB reflects March reality.

Scenario 2

(a) Yes, an adjusting entry is required at March 31. (b) Type: prepaid expense (deferral of expense). (c) Debit insurance expense, credit prepaid insurance for the portion of coverage consumed in March (half month if policy starts mid-month, or prorate per day). Prepaid insurance is correct at payment; amortization adjusts expense.

Scenario 3

(a) No adjusting entry is required if the $2,000 was properly recorded as utilities expense in March. (b) Not applicable for a correct accrual recorded in routine entries. (c) The described entry is wrong because it credited cash before cash left. The correct March 31 entry should debit utilities expense and credit utilities payable (accrued expense type). If only the wrong entry exists, replace it: debit utilities expense, credit utilities payable, and reverse the erroneous cash credit through a correcting entry. The lesson point: accruals hit payables, not cash, until payment in April.

Key takeaways

• Adjusting entries bridge the unadjusted trial balance from Unit 2 to accrual-aligned statements required by Lessons 2 and 3 in this unit.
• Four classic types cover most month-end packages: prepaid expenses, accrued expenses, unearned revenue, and depreciation or accrued interest.
• Pure adjusting entries do not touch cash; they pair income statement accounts with balance sheet accounts.
• The adjusted trial balance must still balance and becomes the direct foundation for the P&L and balance sheet.
• Support schedules (payroll, interest, deferral amortization) turn estimates into auditable close discipline.

1. Ask your finance team for last month's adjustment memo. Which items were estimates versus verifiable facts? Which accounts moved the most?
2. Pick a public company 10-K and read the revenue recognition and depreciation footnotes. What deferrals or accruals might their month-end close include?
3. Continue to Lesson 5: Closing the Books. You will move adjusted revenue and expense balances into retained earnings, reset temporary accounts, and complete the full Unit 3 cycle from trial balance through close.