How Often Should I Record Business Transactions?

By Bill Stilwell · Last reviewed October 17, 2026

The short answer

Record every business sale and every business expense, soon after it happens. Each entry needs the date, the amount, who you paid or who paid you, and what it was for, with a receipt or invoice behind it. A short weekly session keeps your books current and keeps tax time from turning into a guessing game.

What this means

The Internal Revenue Service (IRS) says your records must clearly show your income and expenses, and they must be backed by supporting documents like sales slips, paid bills, invoices, receipts, deposit slips, and canceled checks. For expenses, the IRS says records should show the payee, the amount, proof of payment, the date, and what you bought.

The IRS also says that for most small businesses, the business checking account is the main source of entries in the books. That’s why a separate business account matters so much (see 10.4.1 Business Operating Account).

Made-up example: Bright Path Cleaning connects its bank and card accounts to its bookkeeping software. Every Friday, the owner spends a short session reviewing new transactions. She picks the right category for each one, attaches the receipt photo, and adds a note for anything unusual, like “Carpet machine rental, Henderson job.” Cash tips and cash payments get entered by hand that same day.

Why it matters

You can’t deduct what you can’t prove. The IRS says you must be able to support the items on your return.
Memory fades fast. A charge from three months ago with no note is hard to explain.
Late books mean late decisions. You find out you lost money on a job long after you could have fixed the price.
Missing cash income is a real tax problem. All business income counts, whether it comes by card, check, app, or cash.

Who this applies to

Every business. If you have only a few transactions a month, a monthly session may be enough. If you have many, do it weekly or more often.

How to do it

Run all business money through business accounts. Keep personal spending out.
Connect bank and card feeds to your bookkeeping software if it supports them. Feeds bring in transactions, but they don’t categorize them correctly on their own.
Pick a set time every week to review new transactions.
Categorize each one using your chart of accounts (see 10.5.1 Chart of Accounts).
Attach the receipt or invoice to the transaction (see 10.5.4 Receipt Storage).
Add a short note for anything that isn’t obvious: who, which job, and why.
Enter cash and check sales the same day you receive them, then deposit them into the business account.
Split mixed transactions. If one charge covers two kinds of expense, record each part in its own account.
Flag personal charges that slipped onto a business card. Record them as owner draws or get them paid back (see 10.6.6 Owner Draws).
Close each month after you reconcile (see 10.5.3 Bank Reconciliation), so old periods don’t keep changing.

What proof to keep

The supporting document for each transaction: receipt, invoice, deposit slip, or statement
Notes on transactions that aren’t obvious
Bank and card statements for every month

The IRS lists how long to keep records. The general period is 3 years, with longer periods in some cases (see 9.8.2 Record Retention Periods).

Common mistakes

Trusting auto-categorize blindly. Software rules guess wrong more often than you’d think.
Letting transactions pile up until tax season.
Recording only the deposit total from a payment processor. The processor may have taken out fees and refunds. Record the gross sale and the fees separately so income isn’t understated.
Counting a transfer between your own accounts as income or as an expense.
Skipping cash sales because they never hit the bank.
Proof of payment without proof of purpose. The IRS says a canceled check alone doesn’t prove a business expense. Keep the bill or receipt too.

When to get help from a pro

A bookkeeper can take this off your plate, and a certified public accountant (CPA) can tell you how to handle tricky items. Questions to ask:

How should I record payment processor deposits that include fees and refunds?
How often should I close the books for a business my size?
What’s the right way to record cash sales and tips?

Bill’s note

[Bill: add a short note. For example, the weekly bookkeeping routine you use for SiteSmarty, or a client who struggled at tax time because months of transactions had no notes.]

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: which accounts I connected, when I review, and how I note unusual items]
[What it cost and how long it took each week:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: the transaction review screen after a weekly session]
[Result so far:]

Questions people ask

How often should I update my books? Weekly works for most small businesses. At the very least, do it monthly, before you reconcile.

What does each transaction need? The date, the amount, who was paid or who paid you, what it was for, and a supporting document.

Do I have to record cash sales? Yes. All business income counts, no matter how you were paid.

Can my bank feed do my bookkeeping? It brings in the transactions. You still have to check the category, attach proof, and add notes.

What if I forgot to record something? Add it with the real date and a note. If it’s in a month you already closed, ask your bookkeeper how to handle it.

Audit check

Question: Is every business transaction recorded with a date, amount, payee, category, and supporting document, and are the books current within the last 30 days?
Pass looks like: Transactions reviewed on a set schedule. Receipts attached. Notes on unusual items. Processor fees recorded separately. Cash sales entered.
Fail looks like: Months of uncategorized transactions. Deposits recorded net of fees. Transfers counted as income. No receipts.
Evidence to collect: A list of uncategorized transactions (should be close to zero), a sample of 10 entries with attached proof, and the date of the last review.

Where this fits

Do this first: 10.5.1 Chart of Accounts

Do this next: 10.5.3 Bank Reconciliation

Sources

IRS, "What kind of records should I keep" (checked October 17, 2026)
IRS, Publication 583, "Starting a Business and Keeping Records" (checked October 17, 2026)
IRS, "How long should I keep records?" (checked October 17, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.