Every business transaction goes through the same five steps: capture the source document, date it under your accounting method, post it with its matching entry, reconcile it to the bank, and close the month. The step that decides whether two people would produce the same books from the same receipts is the second one, so this guide spends most of its time on cash versus accrual, with the 2026 gross receipts test from Rev. Proc. 2025-32 and the inventory rule from Publication 538.
Recording a business transaction is a five-step loop: capture the source document, decide the date it belongs to under your accounting method, post it to the right account with its matching entry, reconcile it against the bank, and close the month so it cannot drift. The step most owners get wrong is the second one. Cash and accrual are not two ways of typing the same thing; they change the month a sale or a bill lands in, and the IRS restricts who may use cash. Everything below follows that order, with the 2026 thresholds from IRS primary sources.
A bank feed line is evidence that money moved. It is not a record of what the transaction was. The invoice, receipt, bill, contract or payroll register is the source document, and the bookkeeping entry is built from it. Practically: attach the document to the entry in QuickBooks or Xero at the moment you post it, because the IRS record-keeping rule in §6001 requires that your books be supported by documents sufficient to establish the amount, and a bank line labelled “AMZN MKTP” establishes nothing. The expense guide covers which categories need which proof; the point here is sequence. Document first, entry second, bank match third.
This is the decision that defines your books. Under the cash method you record income when you actually or constructively receive it and expenses when you pay them. Under the accrual method you record income when you earn it (the invoice date, broadly) and expenses when you incur them (the bill date), regardless of when cash moves. IRS Publication 538 sets out both.
The same transaction, both ways. You finish a $4,800 job on 28 March, invoice it the same day, and the client pays on 9 May. Under accrual the $4,800 is March revenue and sits in accounts receivable until May. Under cash it is May revenue and March shows nothing. A $1,200 supplier bill dated 30 June and paid 15 July is a June expense under accrual and a July expense under cash. Neither is wrong; they are different books, and a quarterly profit and loss can swing by the whole value of your open invoices depending on which one you run.
Who may use cash. Most individuals and sole proprietors can. A C corporation or a partnership with a C corporation partner may use cash only if it meets the §448(c) gross receipts test. For tax years beginning in 2026, Rev. Proc. 2025-32 sets that test at average annual gross receipts of $32,000,000 or less over the three prior tax years (it was $31,000,000 for 2025). Tax shelters cannot use cash at any size. A business that fails the test must switch to accrual for the year it fails.
Inventory does not force accrual any more. The old rule that anyone with inventory had to accrue is gone for businesses under the gross receipts test: Publication 538 lets a qualifying small business treat inventory as non-incidental materials and supplies, or follow the method in its own books. That change is why so many product businesses under $32 million now legitimately run cash-basis tax books.
Pick once, then stay. The method you use on your first return is your method. Changing later generally needs Form 3115, and while many small-business changes are automatic-consent, the paperwork is real and the timing matters. The practical advice is to choose accrual if you invoice on terms, carry inventory, or expect a lender to ask for GAAP-style statements, and cash if you are paid at the point of sale and want the books to track the bank. Many businesses keep accrual books and file cash-basis returns; QuickBooks and Xero both switch a report between the two, but only if the underlying entries were recorded with proper dates.
Every transaction touches at least two accounts: the money side and the reason side. A customer payment credits revenue (or receivables, under accrual) and debits the bank. A bill debits an expense and credits accounts payable or the bank. That pairing is what makes the trial balance balance and what lets a reconciliation catch a missing entry; the double-entry guide walks through the debit and credit rules if they are new.
Choosing the “reason” account is where the chart of accounts earns its keep. Keep it short enough that two people would file the same receipt in the same place: one account per tax line you will need to report, plus the handful of management splits you genuinely use. Three special cases deserve their own accounts from day one:
Posting is a claim; reconciling is the proof. Once a month, match every entry to the bank and card statements and make the statement balance agree with the book balance to the cent. Items that appear on the statement and not in the books are transactions you never captured (step 1 failed). Items in the books and not on the statement are either timing differences or duplicates. A reconciled month is one where both lists are empty or explained. If you do not reconcile, the accounting method you chose in step 2 is academic, because the numbers underneath it are unverified.
A closed month is one where the reconciliations are done, the accruals or deferrals are posted (if you are on accrual), the sales tax and payroll liabilities tie to the filed returns, and the period is locked in the software so a later edit cannot silently change a report you have already given to a lender or your CPA. The month-end close checklist is the working list for this step; the bookkeeping checklist covers the weekly rhythm that feeds it.
Run every transaction through those five steps and the books will be defensible on audit, usable for a loan and ready to file from. Skip step 2 and you will have a set of numbers that changes depending on who runs the report.
Generally yes, if it meets the gross receipts test: $32,000,000 or less in average annual gross receipts over the prior three tax years for tax years beginning in 2026. Publication 538 allows such a business to treat inventory as non-incidental materials and supplies rather than accrue.
The date. Cash records income when received and expenses when paid; accrual records income when earned and expenses when incurred. A March invoice paid in May is March revenue under accrual and May revenue under cash.
Every transaction, from its source document. The bank feed confirms money moved; the invoice, bill or receipt proves what it was for, which is what §6001 record-keeping requires and what a reconciliation checks against.
Yes, but it is a change in accounting method that generally requires Form 3115. Many small-business changes qualify for automatic consent, but the form and the timing still apply, so choose deliberately on the first return.
If the backlog is already months deep, the catch-up bookkeeping page explains how a year is rebuilt month by month; for the ongoing loop, the bookkeeping service runs all five steps every month.
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Founder of Numerawise Solutions, established MMXXIV in Atlanta. Intuit ProAdvisor Gold tier. Former Intuit Technical Support engineer. Has personally led two hundred accounting software conversions for US small businesses since founding the practice. Reachable directly at [email protected].