Quick answer

Catching up on a year of neglected bookkeeping is a sequence, not a single push. First, separate business and personal money. Second, gather every statement and document for the twelve months. Third, import the bank and card activity into one set of books. Fourth, categorise it. Fifth, reconcile each month to the bank. Sixth, produce the reports and hand them to whoever prepares the tax return.

Work one month at a time, oldest first, and reconcile each month before starting the next. If the pile is large, the records are mixed with personal spending, or a tax deadline has already passed, paying a human bookkeeper to do the cleanup is often cheaper than the owner's own time and the cost of mistakes.

Where should catching up start?

It starts with a decision about the money, not the software. If business income and spending have run through a personal account, sort that out first, because every later step is slower when the two are tangled.

The IRS is direct about this in Publication 583: "One of the first things you should do when you start a business is open a business checking account." It adds that the business account should be kept separate from the personal one. The same publication says to use the business account for business purposes only, and to note the source of deposits and the type of expense. It calls the business checkbook "your basic source of information for recording your business expenses."

Opening a business account does not fix the past twelve months, but it stops the problem growing. From the opening date, every transaction is clean, and only the backlog needs untangling. For someone who has not yet formed an entity or opened an account, ZenBusiness handles the formation, the EIN and the registered agent, and offers a free accounting consultation to customers who form with it. It does not offer business banking, so the account itself is opened with a bank of the owner's choice.

How do you gather a year of records?

Collect everything for the twelve months into one place before entering anything. A folder on a computer works, and so does a physical box that is scanned later.

Start with the sources that are easiest to retrieve: bank statements, credit card statements, and payment platform reports. These are the backbone of the catch-up, because they show every transaction even when receipts are missing. Most institutions let account holders download a year of statements in a few minutes.

Then collect the supporting documents. The IRS, in Publication 583, names what backs up each kind of figure. For gross receipts, it lists cash register tapes, bank deposit slips, receipt books, invoices and credit card charge slips. For purchases and inventory, it lists canceled checks, cash register tape receipts, credit card sales slips and invoices. For expenses, it lists canceled checks, cash register tapes, account statements, credit card sales slips and invoices. For assets, it lists purchase and sales invoices, real estate closing statements and canceled checks.

Missing receipts are normal in a neglected year. Where one is gone, the statement entry still shows the date, amount and payee, and that is a starting point. Vendors can often re-send invoices, and email searches usually turn up more than expected.

How do you get the transactions into one set of books?

Choose the tool first, then import. Connecting the business bank and card accounts is the fastest route, because the software pulls the past activity in and nothing has to be typed. Where a connection is not possible, a statement file can usually be uploaded instead.

Set the opening date to the start of the twelve-month period. Then bring in the opening balance of each bank account from the first statement, so that the software's figures start from the same place as the bank's.

Import every account, not just the main one. A forgotten card or payment platform is the most common reason a catch-up does not reconcile at the end. If personal and business activity share an account, import it anyway and mark the personal items as owner draws or personal spending as they come up.

How do you categorise a year of transactions without losing a week to it?

Categorise in batches, not one at a time. Most software suggests a category and learns from corrections, so the first few dozen transactions teach it and the rest go faster.

Group by payee. Sort the list so that every payment to the same vendor sits together, set the category once, and apply it to the lot. Software subscriptions, shipping, advertising and utilities usually clear in minutes this way.

Leave the awkward ones for last. Park anything unclear in a holding category and return to it once the easy ninety percent is done. A short list of open questions is much easier to answer than a long list of everything.

Keep the categories few and plain. A catch-up is not the time to design a detailed chart of accounts, and a tax preparer would rather receive twelve sensible categories than forty overlapping ones.

How do you reconcile each month?

Reconciliation is the step that proves the work. For each month, compare the software's ending balance for each account to the ending balance on the bank statement. They should match to the cent.

Start with the oldest month and finish it before moving on. If January does not reconcile, February's opening balance is wrong, and the error carries forward. Fixing it at the source is far cheaper than finding it in December.

When a month will not match, the cause is usually one of a few things: a transaction imported twice, a transaction missing, an amount keyed wrongly, or a transfer between two accounts recorded on only one side. Work through those in turn. Most differences come down to one or two entries.

How long do the records need to be kept?

Catching up is also the moment to set up storage properly, because the records have to last. The figures below come from the official sources named, and they cover only the situations listed.

The IRS, in its guidance on how long to keep records, sets a default of three years. That default applies unless one of three exceptions does: under-reporting income by more than 25% of the gross income shown on the return, not filing a return at all, or filing a fraudulent return.

According to the same IRS guidance:

  • Records should be kept for six years if income that should have been reported was left off the return and the omitted amount is more than 25% of the gross income shown on it.
  • Records should be kept indefinitely if no return was filed.
  • Records should be kept indefinitely if a fraudulent return was filed.
  • Records should be kept for seven years for a claim for a loss from worthless securities or a bad debt deduction.
  • Employment tax records should be kept for at least four years after the date the tax becomes due or is paid, whichever is later.

The indefinite period for an unfiled return is worth noting for anyone who is a year behind on bookkeeping and may also be behind on filing. Records for a year with no return filed should be kept, not discarded.

For businesses with employees, the US Department of Labor, in Fact Sheet 21 on Fair Labor Standards Act recordkeeping, says employers must preserve payroll records, collective bargaining agreements, and sales and purchase records for at least three years. Time cards, piece work tickets, wage rate tables, work and time schedules, and records of additions to or deductions from wages must be kept for two years.

In California, the California Department of Tax and Fee Administration, in Publication 116, says sales and use tax records should be kept for at least four years, and longer during an audit: all records covering the audit period should be retained until the audit is complete. Other states' rules are not covered here, and a reader elsewhere should check with their own state tax agency.

When is a human bookkeeper the cheaper option?

A bookkeeper is cheaper when the cost of the owner's time, plus the cost of getting it wrong, exceeds the bookkeeper's fee. That tends to happen in a few recognisable situations.

The first is a tangled backlog: personal and business spending mixed together, several accounts, missing statements, or transactions nobody can explain. The second is a deadline, such as a tax return that cannot be prepared without finished books. The third is volume, where the number of transactions makes the manual route a matter of weeks.

The fourth is simple: the owner will not do it. A catch-up that sits unfinished for another year costs more than a one-off fee. If that is the honest prediction, hiring help early is the sensible move.

Doing it yourself still makes sense when the backlog is a single clean account, the transaction count is modest, and the owner is willing to give it a few focused sessions. In that case, software and the order of steps above are enough.

Which tools and services are worth knowing about?

The providers below are listed alphabetically, not ranked. Prices are as of 2026-10-06, and the monthly figures are the ongoing prices unless labelled promotional.

Bench. Bench is priced as a bookkeeping service rather than a self-serve tool. Bookkeeping Light is $199 per month, Bookkeeping is $399 per month, and Bookkeeping + Tax is $649 per month. A fractional bookkeeper is $55 per hour plus a $1,200 onboarding fee. For a tangled backlog, the hourly option is the one to look at.

FreshBooks. FreshBooks plans are Lite at $23 per month, Plus at $43 per month and Premium at $70 per month. A Select tier is available by quote only. A promotional rate of $1 per month for one year on Lite has been offered, and that is not the ongoing price.

QuickBooks Online. QuickBooks Online has five tiers: Free at $0, Simple Start at $38 per month, Essentials at $85 per month, Plus at $140 per month and Advanced at $340 per month. A promotional rate of 50% off for three months has been offered, and that is not the ongoing price. It is the most widely used option, so if an accountant already works in it, matching it makes a catch-up easier to hand over.

Wave. Wave's Starter plan is free, and Pro is $19 per month or $190 per year. A promotional rate of $9.50 per month for three months on Pro has been offered, and it is not the ongoing price. Add-ons are priced separately: card processing is 2.9% plus $0.60, the receipts add-on is $8 per month, and payroll starts from $25 per month.

Xero. Xero's plans are Early at $27 per month, Growing at $59 per month and Established at $97 per month. A promotional rate of 80% off for three months has been offered, and that is not the ongoing price.

ZenBusiness Money Pro. ZenBusiness Money Pro is $30 per month, according to ZenBusiness's own published pricing as of 2026-10-06. It is sold as an add-on alongside business formation, and its published description covers custom invoicing, revenue and expense tracking, and tax preparation tools. It is a bookkeeping service rather than accounting software, so it is not comparable feature for feature with the self-serve tools. Whether it covers a twelve-month cleanup of past records is not published, so that is a question to ask before relying on it.

Zoho Books. Zoho Books has a Free plan at $0, limited to businesses under $50,000 in annual revenue. Paid plans are Standard at $20 per month, Professional at $50 per month, Premium at $70 per month, Elite at $150 per month and Ultimate at $275 per month.

For a straightforward catch-up that the owner does personally, a free or low-cost tier is enough, since the work is in the steps rather than the features. For a messy one, a service or an hourly bookkeeper is the better fit than any self-serve tool.

What should happen once the books are caught up?

Keep them caught up. A short weekly session to review new transactions, and a monthly reconciliation, stops the backlog from returning. Twenty minutes a week is a realistic target for a small business.

Hand the finished reports to whoever prepares the tax return. A profit and loss statement shows income less expenses over a period, and a balance sheet shows what the business owns and owes at a point in time. Those two reports are usually what a preparer asks for first.

Store the supporting documents alongside the transactions, so that each entry has its receipt or invoice attached. That keeps the records usable for as long as the retention periods above require.

Frequently asked questions

Can a year be caught up in a weekend? For a single clean account with modest volume, often yes. For several accounts or mixed personal spending, it usually takes longer, and that is where help becomes worth considering.

What if receipts are missing? The bank or card statement still shows the date, amount and payee. Request copies from the vendor where possible, and keep a note of anything that cannot be recovered.

Should the catch-up start with the oldest or newest month? Oldest. Each month's opening balance depends on the one before it, so reconciling in order is the only way to be sure the later months are right.

Sources

This is general information, not legal, tax or accounting advice, and requirements vary and change.