Behind on your books: a catch-up plan, in the order that limits the damage

Falling behind on the books rarely happens all at once. A busy quarter goes unreconciled, a return gets extended and then missed, and the pile becomes something to avoid. By the time most owners look for help, the question is no longer how to do bookkeeping. It is where to start.

The order matters, because the consequences are not the same size. This article sets out what the delay is costing, the sequence that contains it, and how to rebuild records that are gone. It is general information for getting organized. The decisions about what to file, and when, belong with a tax professional who can see your whole situation.

What being behind costs

An unfiled return sets three meters running, and one of them runs much faster than the others.

• Failure to file: “5% of the tax due… for each month or partial month the return is late,” up to 25%.¹
• Failure to pay: “0.5% of the unpaid taxes for each month or part of a month the tax remains unpaid,” also up to 25%.²
• Interest: 7% a year, compounded daily, for the last quarter of 2026.³

In a month when both penalties apply, the filing penalty is reduced by the payment penalty, so together they come to 5%.² That still leaves a wide gap between the two.

Five months late$8,000 of tax owed

If the return was…	Penalties
Filed on time, paid five months late 0.5% × 5 months	$200
Filed and paid five months late (4.5% + 0.5%) × 5 months	$2,000

Interest is charged on top in both cases. A return more than 60 days late also has a minimum penalty: $525, or the whole tax if that is less, for returns due in 2026.

This is the reason behind the plainest advice the IRS gives non-filers: “File all tax returns that are due, regardless of whether or not you can pay in full.”⁴

Partnerships and S corporations pay even when no tax is due

These businesses usually owe no income tax themselves, so their late-filing penalty is built differently: a flat amount for each partner or shareholder, for each month or part of a month, “for up to 12 months.”¹ The amount depends on the year the return was due.

Late Form 1065 or 1120-SPer owner, per month

Return was due in	Penalty
2027	$260
2026	$255
2025	$245
2024	$235
2023	$220
2021 or 2022	$210

Two owners, one return due in 2026 and filed a year late: 2 × $255 × 12 = $6,120.

Two clocks that do not behave the way people expect

The refund clock keeps running. If a late return would have produced a refund, “you must file your return to claim it within 3 years of the return due date.”⁴ After that the money is gone. The IRS also holds current refunds while earlier returns are missing.

The audit clock never starts. The usual three-year limit on the IRS runs from the date a return is filed. With no return, the tax code says the tax may be assessed “at any time.”⁵ If the IRS prepares a substitute return for you, that does not start the clock either, and the IRS warns that such a return “might not give you credit for deductions and exemptions you may be entitled to receive.”⁴ An unfiled year stays open until you close it.

The order to work in

Catch-up sequence

1. Payroll and sales tax firstMoney withheld from employees or collected from customers. Unpaid, it can become your personal debt.
2. Stop the gap from growingStart keeping this month’s books properly now, before touching the backlog.
3. Collect every statement for the gapAll accounts, every month, before any bookkeeping begins.
4. Rebuild the newest year, then work backwardOne exception: a year whose refund window is about to close goes first.
5. File each return as its year is finishedEven if you cannot pay it yet.
6. Then ask about relief and a payment planBoth generally require the returns to be filed first.

Why payroll and sales tax jump the queue

Income tax a business owes is the business’s debt. Tax it withheld from employees’ pay is different. The IRS calls these trust fund taxes, and when they go unpaid it can assess a penalty “equal to the unpaid balance of the trust fund tax” against any responsible person: someone with “the duty to perform and the power to direct the collecting, accounting, and paying” of those taxes. That reaches past the business itself. “Once we assert the penalty, we can take collection action against your personal assets.”⁶

One sentence on the same page is worth reading twice by anyone tempted to pay suppliers first and the payroll deposit later: “Using available funds to pay other creditors when the business is unable to pay the employment taxes is an indication of willfulness.”⁶ Late deposits carry their own penalty as well, from 2% to 15% depending on the delay.⁷

States treat collected sales tax in a similar spirit, though the rules are theirs. California can hold a responsible officer or member “personally liable for any unpaid taxes and interest and penalties” in certain circumstances, and New York tells owners plainly that “you can be held personally responsible even though the business is a corporation or a limited liability company.”⁸

Why the newest year comes before the oldest

Instinct says to begin at the beginning. Three things argue for the opposite.

• Its records are the easiest to get, and the people who can answer questions about it still remember.
• It is the year everything current depends on: this year’s estimated taxes, a loan application, a landlord’s request.
• Each finished year makes the one before it easier, because its opening balances are the earlier year’s closing ones, and the recurring vendors and customers are already identified.

How far back to go

Legally there is no limit on an unfiled year. As a matter of practice, the IRS’s own policy statement on delinquent returns says: “Normally, application of the above criteria will result in enforcement of delinquency procedures for not more than six (6) years. Enforcement beyond such period will not be undertaken without prior managerial approval.”⁹

That is why six years is the usual scope of a catch-up project. It is a policy and not a promise, and a lender or a state agency may ask for something different, which is one of the reasons the filing plan belongs with your tax professional. The same statement makes a point that should take some of the dread out of this: returns filed late on your own initiative “will be accepted.”

Where missing records come from

The most common reason people give for not starting is that the paperwork is gone. It usually is not. It is just held by someone else.

Sources for lost records

Source	What it gives you	How far back
Banks and card issuers	Every deposit and payment, by date	Banks must keep account records 5 years
IRS wage and income transcript	Every 1099, W-2, and 1098 filed under your number	This year and nine before it
IRS account transcript	What the IRS shows as filed, paid, and assessed	This year and nine before it
Your own filings	Sales tax and payroll returns, which reflect gross sales and wages	As long as the agency or provider keeps them
Processors, suppliers, payroll service	Sales reports, copies of invoices, pay registers	Varies; ask early

Bank statements are the backbone. Federal rules require banks to keep “each statement, ledger card or other record on each deposit or share account, showing each transaction,” and to retain required records “for a period of five years.”¹⁰ Online banking often shows less than that, so ask the bank for the older statements; there may be a fee. The IRS’s guidance on rebuilding records starts in the same place: “get copies of bank statements. The deposits should closely reflect what the sales were for any given time period.”¹¹

The IRS will tell you what it already knows. A wage and income transcript “shows data from information returns we receive such as Forms W-2, 1098, 1099, and 5498” and “is available for the current and nine prior tax years.”¹² For a sole proprietor this is a list of every customer who reported paying you, going back further than your bank is required to. It is also exactly what the IRS will compare your late returns against, which makes it the first document to pull. Two limits: it shows only what payers filed, not all your income, and online it holds roughly 85 documents, beyond which the request goes on Form 4506-T. Corporations and partnerships request business transcripts instead.¹³

Accounting software will not reach back on its own. When a bank is first connected to QuickBooks Online, “download timespans vary by bank, ranging from 90 days up to 24 months.” Anything older comes in by uploading statements or transaction files, in batches of “up to 1,000 lines per upload.”¹⁴ This is a large part of why catching up several years is real work rather than a button to press.

What can be rebuilt, and what cannot

Most of a business’s income and ordinary expenses can be reconstructed from the sources above: deposits from statements, expenses from statements matched to invoices that vendors can resend.

Three categories are harder, because the law demands specific proof for them: travel, vehicle use, and gifts. For these, “you can’t deduct amounts that you approximate or estimate.” Where records are incomplete, the IRS describes the only fallback: your own statement “containing specific information about the element,” together with “other supporting evidence that is sufficient to establish” it.¹⁵ For mileage, that means rebuilding trips from an appointment calendar, job tickets with addresses, or service records, one by one. A round number for the year is not evidence. An honest catch-up leaves out what cannot be supported, and that is a better outcome than a deduction that fails when someone asks about it.

Our article on what business records have to show covers these proof rules in more detail.

Who does which part

Catching up is two jobs that are easy to confuse. Rebuilding the books is bookkeeping. Deciding what to file, signing returns, and dealing with the IRS on your behalf is tax practice, and speaking for you before the IRS is reserved for attorneys, CPAs, and enrolled agents.

There is one tool that connects the two. With Form 8821 you can authorize anyone you choose, including a bookkeeper, “to inspect and/or receive your confidential information” from the IRS for the years you list. That is enough to pull the transcripts described above. It does not allow that person “to speak on your behalf.”¹⁶ In practice, the bookkeeper gathers and rebuilds, and the tax professional files and negotiates, each from the same set of books.

Relief exists, with limits

Three kinds of help are worth knowing about before you assume the worst.

Penalty relief for a clean history. The IRS’s first-time abatement policy removes filing, payment, and deposit penalties for taxpayers with “three years of timely compliance history.” From the summer of 2026 the IRS is replacing it, for 2025 returns onward, with relief it applies automatically. For earlier years the older policy still applies.¹⁷ Its limit matters in a catch-up: it covers a single tax period, so across several late years it can help with one of them at most.¹⁸

Relief for reasonable cause. This requires showing that “you exercised ordinary care and prudence and were nevertheless unable to file your return or pay your taxes on time.” The IRS says that not having the money, by itself, generally does not qualify.¹⁷

Payment plans. An individual who owes $50,000 or less in combined tax, penalties, and interest can apply online for a monthly plan. The condition that matters here is the next line of the same page: “You have filed all required returns.” Businesses other than sole proprietors cannot apply online and have to call.¹⁹

All three point the same way. The returns come first, which means the books come first.

What a finished catch-up looks like

It helps to know what you are aiming at. When the work is done you should be able to put your hands on:

• every bank, card, and loan account reconciled to its statement for every month of the gap;
• a profit and loss statement and a balance sheet for each year;
• a short list of the judgment calls that were made and what supports them;
• a package for your tax professional for each unfiled year; and
• a monthly routine, so the next close takes hours rather than another rescue.

The last item is the one that makes the rest worth doing. A backlog that is cleared and then allowed to regrow costs the same again in two years.

Sources

1. Internal Revenue Service, Failure to file penalty. Page last updated October 5, 2026. Amounts for returns due in 2027: Revenue Procedure 2025-32, sections 4.52, 4.55, and 4.56.
2. Internal Revenue Service, Failure to pay penalty. Page last updated June 5, 2026.
3. Internal Revenue Service, news release IR-2026-98, Interest rates remain the same for the fourth quarter of 2026, August 21, 2026.
4. Internal Revenue Service, Filing past due tax returns. Page last reviewed May 7, 2026.
5. Internal Revenue Code section 6501, subsections (c)(3) and (b)(3). Legal Information Institute, Cornell Law School.
6. Internal Revenue Service, Employment taxes and the Trust Fund Recovery Penalty (TFRP). Page last reviewed October 11, 2026.
7. Internal Revenue Service, Failure to deposit penalty. Page last reviewed February 24, 2026.
8. California Department of Tax and Fee Administration, Personal liability for corporate and limited liability company sales and use taxes; New York State Department of Taxation and Finance, Tax Bulletin ST-75.
9. Internal Revenue Manual 1.2.1.6.18, Policy Statement 5-133, Delinquent returns: enforcement of filing requirements.
10. Treasury regulations, 31 CFR 1010.430 and 31 CFR 1020.410. Electronic Code of Federal Regulations.
11. Internal Revenue Service, Reconstructing records after a natural disaster or casualty loss. Page last reviewed July 29, 2026.
12. Internal Revenue Service, Transcript types for individuals and ways to order them. Page last reviewed March 10, 2026.
13. Internal Revenue Service, Get a business tax transcript. Page last reviewed July 27, 2026.
14. Intuit, Connect bank and credit card accounts to QuickBooks Online, updated October 1, 2026, and Manually upload transactions into QuickBooks Online, updated August 24, 2026.
15. Internal Revenue Service, Publication 463, Travel, Gift, and Car Expenses, 2025 edition, chapter 5.
16. Internal Revenue Service, Instructions for Form 8821, Tax Information Authorization, and Power of attorney and other authorizations.
17. Internal Revenue Service, Administrative penalty relief, page last reviewed July 14, 2026, and Penalty relief for reasonable cause.
18. Internal Revenue Manual 20.1.1.3.3.2.1, First Time Abate.
19. Internal Revenue Service, Online payment agreement application. Page last reviewed September 14, 2026.