If your accountant didn’t file your taxes, the IRS still holds you personally responsible, and penalties began accruing the day after the deadline at 5% of unpaid tax per month.1Internal Revenue Service. Failure to File Penalty Hiring a preparer does not shift that legal duty. What you can do is stop the damage now by filing the return yourself as quickly as possible, then pursue penalty relief from the IRS and financial recovery from the accountant.
Confirm the Return Really Wasn’t Filed
Before anything else, verify the situation. Accountants sometimes file late, file without telling the client, or file returns with errors that never fully process. Log into your IRS Online Account and pull a Verification of Non-Filing Letter, which states outright that the IRS has no processed return on record for the year in question. An Account Transcript will confirm the same thing from the other direction by showing any return posting and tax assessment if one exists.2Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them
If you’re bringing in a new tax professional to clean this up, they’ll need authorization to talk to the IRS on your behalf. That happens through Form 2848, Power of Attorney and Declaration of Representative. Both of you sign it, and the new representative has 45 days from your signature to complete their portion.3IRS: Instructions for Form 2848. Instructions for Form 2848
File the Return Immediately
Speed is the single biggest lever you have. The failure-to-file penalty is 5% of unpaid tax per month, capped at 25%. The failure-to-pay penalty is only 0.5% per month. Filing the return, even without paying, cuts your monthly penalty by 90%.1Internal Revenue Service. Failure to File Penalty
If the original deadline hasn’t passed yet, file Form 4868 today for an automatic six-month extension. That eliminates the failure-to-file penalty if it’s in by the due date. Be aware that an extension pushes the filing deadline only, not the payment deadline. Interest still runs on any unpaid tax from the original due date.4Internal Revenue Service. Form 4868 – Application for Automatic Extension of Time To File U.S. Individual Income Tax Return
If the deadline is already behind you, gather your W-2s, 1099s, and other income documents and prepare the return with a new preparer or reputable tax software. E-file if you can and save the electronic confirmation. If you have to paper file, use certified mail with a return receipt so you have proof of the filing date. Pay as much of the balance as you can with the return. If you can’t cover it in full, file anyway and then apply for an IRS installment agreement. An approved payment plan drops the ongoing failure-to-pay penalty from 0.5% to 0.25% per month.5Internal Revenue Service. Failure to Pay Penalty
What the Penalties and Interest Will Cost You
Two penalties run at the same time on an unfiled return with a balance due.
- Failure-to-file: 5% of unpaid tax per month or partial month, capped at 25%. If the return is more than 60 days late, a minimum penalty of $525 or 100% of the unpaid tax, whichever is less, applies for returns required to be filed in 2026.6Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest
- Failure-to-pay: 0.5% of unpaid tax per month, also capped at 25%. When both apply in the same month, the failure-to-file penalty drops to 4.5%, keeping the combined rate at 5%.5Internal Revenue Service. Failure to Pay Penalty
On top of penalties, interest accrues on the unpaid tax from the original due date. The rate adjusts quarterly, compounds daily, and runs until the balance is paid.7Internal Revenue Service. Quarterly Interest Rates
One thing to understand up front: the IRS has programs to waive penalties, but interest is almost never forgiven. Interest abatement is available only when an IRS employee caused unreasonable error or delay, and your representative and you must not have contributed. An accountant’s negligence doesn’t qualify.8Internal Revenue Service. Interest Abatement Any interest that accumulated because the return sat unfiled is yours to pay. Recovering it means going after the preparer.
What Happens If You Do Nothing
Ignoring the problem makes it substantially worse. The IRS typically opens with a CP59 notice indicating no return on record, followed by increasingly urgent letters. Eventually the IRS prepares a substitute for return using income data reported by employers and banks.9Internal Revenue Service. What to Expect After Receiving a Non-Filer Compliance Alert Notice and What to Do to Resolve
A substitute return almost always produces a higher tax bill than the return you would have filed. The IRS won’t claim your deductions, itemized expenses, or most credits, and it can’t elect joint filing status for a married taxpayer. You get the standard deduction and that’s it.10Internal Revenue Service. 4.12.1 Nonfiled Returns After the substitute is prepared, a CP3219N notice, the 90-day letter, proposes the assessment. Miss that 90-day window without filing your own return or petitioning Tax Court, and the inflated assessment sticks. Collection activity, including liens and levies, follows.
There’s also no statute of limitations shielding you. The three-year assessment clock only starts when a return is filed. If you never file, the IRS can pursue that year indefinitely.11Internal Revenue Service. Help Yourself by Filing Past-Due Tax Returns
Getting the Penalties Waived
Once the late return is filed and you’ve paid what you can, request penalty relief. The IRS offers two main paths.12Internal Revenue Service. Penalty Relief
First-Time Abatement
The easier option if you qualify. The IRS will waive failure-to-file, failure-to-pay, and failure-to-deposit penalties for taxpayers who filed all required returns on time and received no penalties during the three tax years before the penalty year (or had any prior penalty removed for a reason other than this same program).13Internal Revenue Service. Administrative Penalty Relief Call the number on your penalty notice to request it. Even if you ask for reasonable cause relief, the IRS will typically apply first-time abatement automatically when your compliance history qualifies.
Reasonable Cause Based on Reliance on a Preparer
If first-time abatement isn’t available, argue reasonable cause based on reliance on a tax professional. The IRS doesn’t grant this automatically. You have to show that you gave the preparer everything they needed to file on time, that you reasonably believed they were handling the filing, and that you had no reason to suspect incompetence or dishonesty.
Documentation carries this argument. Assemble the engagement letter, emails or texts confirming the preparer agreed to file by the deadline, proof that you delivered your tax documents, receipts for payment, and a written explanation of when and how you learned the return hadn’t been filed. Submit the request by phone for failure-to-file and failure-to-pay penalties, or by mailing Form 843, Claim for Refund and Request for Abatement, with a detailed written statement attached.14Internal Revenue Service. Instructions for Form 843 (Rev. December 2024) The stronger your paper trail, the better the outcome.
Don’t Let a Refund Expire
If the unfiled year was one where you were actually owed a refund, the timeline is unforgiving. You have three years from the original return due date to claim it. Miss that window and the money is gone, permanently. The same cutoff applies to refundable credits like the Earned Income Credit.15Internal Revenue Service. Filing Past Due Tax Returns If your accountant sat on a return for two years and you’re only now discovering it, you may be closer to the cutoff than you think. The IRS also holds refunds for any year when other returns are past due, so one unfiled year can freeze refunds for other years.
Recovering Your Losses From the Accountant
Fixing the IRS side is the priority. But you shouldn’t absorb costs someone else’s negligence created. A malpractice claim against a preparer is a standard civil action with four elements.
- Duty of care: the professional relationship created an obligation to handle your filing competently. An engagement letter establishes this, though a verbal agreement or a pattern of prior-year filings can also show it.
- Breach: the preparer failed by not filing on time. IRS records prove this element on their own.
- Causation: the failure directly caused your financial harm. If the return would have been timely but for their inaction, causation is straightforward.
- Damages: quantifiable losses, meaning the penalties assessed, interest charged, and cost of hiring someone to clean up the mess.
The underlying tax you owed isn’t recoverable, because you would have owed it either way. What you can recover are penalties, interest, fees paid to the replacement preparer, and legal costs. On a return that’s a year late with $20,000 in unpaid tax, that adds up quickly.
Before filing suit, send the accountant a written demand explaining the damages, backed by copies of the IRS penalty notices. Some preparers or their insurance carriers settle at this stage to avoid litigation. If the preparer carries Errors and Omissions insurance, that policy is the most likely source of any payment. Ask whether they’re insured. If they are, file a claim directly with the carrier.
Each state sets its own deadline for a malpractice lawsuit, typically between two and seven years. Many states apply a discovery rule, meaning the clock starts when you knew or reasonably should have known about the failure, not on the original tax due date. Even so, don’t drift. Consult an attorney promptly if the amounts are significant. For smaller amounts, small claims court is often the right forum. Filing limits range from $2,500 to $25,000 depending on the state.
Reporting the Preparer
A civil claim recovers your money. Regulatory complaints protect the next client. Both are worth pursuing.
File IRS Form 14157, Return Preparer Complaint, to report the preparer directly to the IRS Return Preparer Office by fax or mail. Describe what happened and attach copies of the engagement letter, your communications, and any penalty notices you received.16Internal Revenue Service. Form 14157 (Rev. 6-2018) Return Preparer Complaint
The IRS Office of Professional Responsibility oversees practitioners authorized to represent taxpayers before the IRS, including CPAs, enrolled agents, and attorneys. It enforces Treasury Circular 230 and can impose sanctions ranging from censure to suspension to permanent disbarment from IRS practice.17Internal Revenue Service. The Office of Professional Responsibility (OPR) at a Glance If the preparer is a CPA, also file with your state’s Board of Accountancy, which controls CPA licensing and can suspend or revoke a license.
Picking a Better Preparer Next Time
Once this is behind you, change how you choose and monitor a preparer. Every paid federal preparer must have a Preparer Tax Identification Number, a PTIN, before preparing returns.18Internal Revenue Service. PTIN Requirements for Tax Return Preparers If someone offers to prepare your return without one, walk away. Look for credentialed preparers, CPAs, enrolled agents, or attorneys, in the IRS Directory of Federal Tax Return Preparers with Credentials and Select Qualifications.19IRS.gov. Directory of Federal Tax Return Preparers with Credentials and Select Qualifications For CPAs, confirm the license is active and discipline-free through the state board.
Insist on a written engagement letter before any work begins. It should spell out what the preparer is responsible for, including filing the return rather than just preparing it, the deadline, fees, and whether the preparer carries Errors and Omissions insurance. A preparer who won’t put the scope in writing has told you enough.
Review the return yourself before it’s transmitted. For e-filed returns, you sign Form 8879, which authorizes the electronic return originator to transmit the return to the IRS. The preparer cannot legally send it until they have your signed Form 8879.20Internal Revenue Service. Form 8879 IRS e-file Signature Authorization Read through the return, verify the numbers, then sign. Afterward, get a copy of the return along with the e-filing confirmation or certified mail receipt, and keep those records for at least four years. If a filing question ever arises, the proof is in your hands, not someone else’s.