Bookkeeping is the recording layer of the accounting cycle: the systematic capture and classification of a business’s financial transactions into accounts, producing the general ledger and trial balance that accounting then adjusts, summarizes and interprets into financial statements. The bookkeeper records what happened; the accountant decides what it means and how it gets reported.
Why the Books Have to Exist
The duty starts in the Internal Revenue Code, not in good practice. Section 6001 requires every person liable for any tax imposed by the title, or for the collection of it, to keep such records, render such statements, make such returns, and comply with such rules and regulations as the Secretary may from time to time prescribe (26 U.S.C. 6001, records, statements and special returns).
The regulation names the record. A person subject to tax under subtitle A, or required to file a return of information with respect to income, has to keep permanent books of account or records, including inventories, sufficient to establish what the return has to show (eCFR, 26 CFR 1.6001-1(a)).
That general rule opens with a carve-out. Individuals deriving gross income from the business of farming, and individuals whose gross income includes salaries, wages or similar compensation for personal services rendered, are required with respect to that income to keep only the records that enable the district director, the IRS official named in the regulation, to determine the correct amount of income subject to the tax. For that income the permanent books of account are not necessary (eCFR, 26 CFR 1.6001-1(b)).
Outside that carve-out, books of account are the required record rather than a management preference. How long that record has to survive is set out in the guide to outsourcing bookkeeping.
What the Recording Work Consists Of
Purchases, sales, payroll and other business transactions generate supporting documents, a category that covers sales slips, paid bills, invoices, receipts, deposit slips and canceled checks, and those documents hold the information that gets recorded in the books (IRS Publication 583, Starting a Business and Keeping Records, Rev. December 2024).
Recording the entries is not the whole job. The business checkbook is the basic source of information for recording business expenses, and the checking account is reconciled each month so that the bank statement, the checkbook and the books agree, with any error the reconciliation turns up corrected in all three (IRS Publication 583, Rev. December 2024).
Inside a CPA firm that loop runs across many client books at once, and the recurring unit of work is the monthly close rather than the single entry. A close is the point at which a period’s recording is finished and the balances are ready to be reported. The cadence between closes sits in the bookkeeping checklist and the close itself in the month-end close checklist.
Journals, Ledgers and the Chart of Accounts
Business transactions are ordinarily summarized in books called journals and ledgers. A journal is a book where each business transaction shown on the supporting documents is recorded, and a ledger is a book that contains the totals from all of the journals, organized into different accounts (IRS Publication 583, Rev. December 2024). The chart of accounts is the list of those accounts, and the general ledger is the set of accounts themselves.
Double-Entry, Debits and Credits
A double-entry bookkeeping system enters each transaction in a journal first and then posts it to ledger accounts. Each account has a left side for debits and a right side for credits, and every transaction is recorded as a debit entry in one account and a credit entry in another. Total debits must equal total credits once the journal entries are posted, and amounts that do not balance mean an error to find and correct (IRS Publication 583, Rev. December 2024). A trial balance is that equality check, run across every ledger account balance at once.
The publication’s own general journal shows a rent payment on October 5 recorded as a debit of $780.00 to rent expense and a credit of $780.00 to cash (IRS Publication 583, Rev. December 2024). One event, two entries, equal amounts, opposite sides of two different accounts.
Bookkeeping Versus Accounting
The line falls where recording stops and judgment starts: bookkeeping captures and classifies transactions into the ledger, and accounting adjusts that ledger, summarizes it into financial statements and interprets what those statements say.
Cutoff, accruals, depreciation policy and the method a client’s books run on are accounting decisions, even when a bookkeeper posts the entries that carry them out. What moving between the cash and accrual methods does to those entries is worked through in the accrual to cash adjustment. Where bookkeeping ends and a client accounting services engagement begins is a different boundary, drawn in the client accounting services guide.
If your firm is carrying more client books than it can close on time, ask for a trial task on your own representative work and let your own reviewer grade it before anything moves.
