Adjusting Entries & Accrual Accounting
Why the books need adjusting, and every adjustment that gets you to an adjusted trial balance.
The accrual basis is what makes financial statements meaningful — and adjusting entries are how the accrual basis actually gets recorded. This chapter takes the topic on its own terms, deeper than the single section inside The Accounting Cycle. You start with why adjustments exist at all, then work the two classic families side by side: deferrals (cash first, recognition later — prepaid expenses, supplies, unearned revenue) and accruals (recognition first, cash later — accrued expenses and accrued revenue). Depreciation follows as the year-end entry it really is: a cost spread over the periods that benefit from it, recorded whether or not anything happened on the day. It closes with the mechanics that tie it together — building an adjusted trial balance, reversing entries, and correcting an adjustment after the books have already been closed — then full year-end cases. Estimate-based adjustments such as the allowance for doubtful accounts and warranty provisions are taught in the Receivables and Liabilities chapters, where they belong. An optional final section shows an interest accrual in US GAAP terms.
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01The Accrual Basis
Why Adjusting Entries Exist: revenue and expenses belong to the period they relate to, not the period the cash moves. Everything else in this chapter follows from that one idea.
02Deferrals
Prepaid Expenses & Unearned Revenue: the cash moved first. An asset or a liability was recorded up front, and the year-end entry moves the used-up or earned portion into the income statement.
03Accruals
Accrued Expenses & Accrued Revenue: the cash has not moved yet. The revenue is earned or the expense incurred, so it must be recorded now with a receivable or a payable against it.
04Depreciation as a Year-End Adjustment
the largest recurring adjusting entry most companies make. Watch the partial-year case, where the asset was not owned for the whole period.
05Putting It Together
The Adjusted Trial Balance: post every adjustment and prove the ledger still balances. This is the statement-ready trial balance the financial statements are built from.
06Reversing Entries & Adjusting After the Books Are Closed
reversing entries are optional housekeeping, but whether the books are already closed changes which accounts an adjustment touches.
07Integrated Year-End Cases
a full set of year-end facts with nothing labelled for you. Decide which adjustment each fact calls for, then record them all.
08Accrued Interest under US GAAPOptional · US GAAP
for US GAAP students — a note payable with interest accrued at year end, in US GAAP terms. IFRS students can skip this section.