Yes, a CPA can help with back taxes, and for most people with an unpaid IRS balance, hiring one is the single most effective move available. CPAs are federally authorized to represent you before the IRS in collection, examination, and appeal matters, which means they can communicate with the IRS on your behalf, file any missing returns, calculate the full amount owed with penalties and interest, pursue penalty relief, and negotiate a payment plan or settlement while collection activity pauses.
What a CPA Is Authorized to Do for You
CPAs are one of only three groups the IRS recognizes as authorized practitioners under Treasury Circular 230. The other two are attorneys and enrolled agents. Unlicensed tax preparers have sharply limited ability to interact with the IRS for you.1Internal Revenue Service. Power of Attorney and Other Authorizations
To formalize representation, the CPA files IRS Form 2848, Power of Attorney and Declaration of Representative. Once that form is on file, the CPA can receive your confidential tax information, argue facts and law on your behalf, negotiate and sign agreements, and receive copies of IRS notices sent to you.2Internal Revenue Service. About Form 2848, Power of Attorney and Declaration of Representative The tone of IRS interactions tends to shift once a credentialed practitioner is on the other end of the call.
The practical work breaks into a few categories: filing delinquent returns, calculating the correct liability, pursuing penalty relief, and negotiating a resolution when you cannot pay in full. The CPA also tracks procedural deadlines, which is where most people managing things alone make costly mistakes.
When a Tax Attorney Is the Better Call
CPAs handle most back-tax situations, but two scenarios call for an attorney instead.
The first is criminal exposure. If you suspect the IRS is investigating you for fraud or willful evasion rather than pursuing a civil debt, you need an attorney. Communications with a CPA carry only a narrow federally authorized practitioner privilege that does not extend to criminal matters or most state proceedings. Attorney-client privilege is broader.
The second is Tax Court litigation. If the IRS issues a notice of deficiency and you want to challenge the bill in court before paying, you generally need an attorney. Some CPAs pass the Tax Court’s non-attorney exam and can represent clients there, but most are not admitted. For the far more common situation of owing money you do not dispute and needing a payment plan or settlement, a CPA is fully equipped.
What the CPA Does First
Before anything useful can happen, the CPA needs the financial records for every year you have an unfiled return or unpaid balance: W-2s, 1099s, K-1s, and records of any estimated tax payments made on Form 1040-ES.3Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals Bring every IRS notice you have received, especially CP2000 notices, which flag income mismatches, and CP504 notices, which signal the IRS is about to levy your bank accounts or wages.4Internal Revenue Service. Understanding Your CP504 Notice
If your records are incomplete, the Form 2848 power of attorney lets the CPA pull transcripts directly from the IRS. Wage and Income Transcripts show all the income reported to the IRS under your Social Security number, including W-2s, 1099s, 1098s, and 5498s.5Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them Account Transcripts show every payment, penalty assessment, and adjustment on your account for a given year. Together, these let the CPA reconstruct each delinquent year even if you have lost every document.
Filing delinquent returns using IRS transcript data is one of the more reliable approaches because the returns align with what the IRS already has, which sharply reduces the chance of triggering an audit based on income discrepancies.
How Fast Penalties and Interest Grow
The IRS charges two separate penalties on overdue taxes, and they compound. The failure-to-file penalty is 5% of the unpaid tax for each month the return is late, capping at 25%. The failure-to-pay penalty is 0.5% per month on the unpaid balance, also capping at 25%. During months when both apply, the failure-to-file penalty is reduced by the failure-to-pay amount, so the effective combined rate during the first five months is 5% per month rather than 5.5%.6Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax
After the failure-to-file penalty maxes out at five months, the failure-to-pay penalty keeps running at 0.5% per month until it hits its own 25% ceiling. Combined maximum penalty exposure is 47.5% of the original tax owed. Interest accrues separately from the return’s due date until the balance is paid, at a rate the IRS sets quarterly.7Office of the Law Revision Counsel. 26 USC 6601 – Interest on Underpayment, Nonpayment, or Extensions of Time for Payment, of Tax
Accurately calculating the penalty and interest components is the foundation of every resolution strategy, and identifying which penalties can be removed often shrinks the balance meaningfully.
Getting Penalties Reduced
The IRS has two primary paths for reducing or eliminating penalties, and a competent CPA evaluates both.
First Time Abatement
First Time Abatement (FTA) is an administrative waiver the IRS grants almost automatically when the criteria are met. You qualify if you filed the same type of return for the three tax years before the penalty year, had no penalties during those three years (or had them removed for a reason other than FTA), and are currently in compliance with all filing requirements.8Internal Revenue Service. Administrative Penalty Relief FTA can wipe out the failure-to-file and failure-to-pay penalties for one tax year, which on a large balance can save thousands.
Reasonable Cause
If FTA does not apply because you have prior penalties or compliance gaps, the CPA can request abatement based on reasonable cause. This requires showing that you failed to file or pay because of circumstances beyond your control, not because you ignored the obligation. Medical emergencies, natural disasters, reliance on a tax professional who gave bad advice, and inability to obtain records are common grounds. The CPA drafts a detailed written statement with supporting evidence and submits the request on Form 843.9Internal Revenue Service. About Form 843, Claim for Refund and Request for Abatement
Reasonable cause requests are where professional help matters most. The IRS denies vague or unsupported requests routinely. A CPA who has handled these before knows what the IRS accepts and how to frame the narrative.
Resolution Options the CPA Negotiates
Installment Agreement
When you owe more than you can pay immediately, the most common resolution is an installment agreement, which lets you pay over up to 72 months. The CPA files Form 9465 to set it up.10Internal Revenue Service. Payment Plans Installment Agreements
For combined balances of $50,000 or less in tax, penalties, and interest, the IRS offers a streamlined approval process that skips the detailed financial disclosure normally required. Streamlined agreements come in two tiers: balances of $25,000 or less and balances between $25,001 and $50,000. You must be current on all filing requirements to qualify.11Internal Revenue Service. IRM 5.14.5 Streamlined, Guaranteed and In-Business Trust Fund Express Installment Agreements
IRS setup fees depend on how you apply and how you pay:
- Direct debit, apply online: $22
- Direct debit, apply by phone or mail: $107
- Non-direct-debit, apply online: $69
- Non-direct-debit, apply by phone or mail: $178
- Low-income taxpayers: fee waived for direct debit agreements, reduced to $43 for other types10Internal Revenue Service. Payment Plans Installment Agreements
Once an installment agreement is active, the IRS stops levy and garnishment actions as long as you make the required payments. Interest and penalties continue to accrue, so the CPA aims to structure the monthly payment as high as you can realistically afford without creating a new financial crisis.
Offer in Compromise
An Offer in Compromise (OIC) lets you settle your tax debt for less than the full amount. The IRS accepts OICs only when it concludes you genuinely cannot pay the full balance within the time it has left to collect. The standard basis is “doubt as to collectibility”: the IRS looks at your assets, income, and allowable expenses and concludes the full amount is uncollectable.
The application requires Form 656 and a detailed financial disclosure on Form 433-A(OIC) for individuals or Form 433-B(OIC) for businesses, along with a $205 non-refundable application fee and an initial payment. For lump-sum offers, the initial payment is 20% of the total offer amount, submitted with the application. For periodic payment offers, you pay the first proposed monthly installment with the application and continue those payments during review.12Internal Revenue Service. Offer in Compromise
The IRS calculates your Reasonable Collection Potential, combining the net equity in your assets with a projection of your future disposable income over the remaining collection period. Your offer generally needs to meet or exceed that figure. The CPA’s role is presenting an accurate financial picture that maximizes your allowable expenses under IRS standards while staying within the rules. Processing typically takes many months.
Low-income applicants (income at or below 250% of federal poverty guidelines) are exempt from both the application fee and the initial payment requirement.12Internal Revenue Service. Offer in Compromise
Currently Not Collectible Status
If your financial situation is severe enough that you cannot cover basic living expenses and pay any portion of your tax debt, the CPA can request Currently Not Collectible (CNC) status. The IRS uses Form 433-A to evaluate your income and expenses against its allowable living expense standards. If the numbers show genuine hardship, the IRS pauses all collection activity.13Internal Revenue Service. 5.16.1 Currently Not Collectible
CNC is not forgiveness. Interest and penalties keep accruing, and the IRS periodically reviews your financial situation. The strategic value is that the 10-year collection clock keeps running while you are in CNC status, so if the hardship persists long enough, the debt can expire entirely.
The 10-Year Collection Clock
The IRS generally has 10 years from the date it assesses a tax to collect it. After that, the debt expires. This deadline is called the Collection Statute Expiration Date (CSED).14Office of the Law Revision Counsel. 26 USC 6502 – Collection After Assessment
Several common taxpayer actions pause or extend the clock. Understanding what suspends the CSED matters because certain resolution strategies that provide short-term relief also buy the IRS more time to collect:
- Installment agreement requests: the CSED is suspended while the IRS reviews your request. If the agreement is rejected or you withdraw, the CSED extends an additional 30 days.
- Offer in Compromise applications: the CSED is suspended during the entire review period. If rejected, it stays suspended another 30 days, and longer if you appeal.
- Bankruptcy: the CSED is suspended from the petition date until the case is discharged, dismissed, or closed, plus an additional six months.
- Collection Due Process hearing requests: the CSED is suspended from the date the IRS receives your request until you withdraw it or the IRS issues a final determination.15Internal Revenue Service. Time IRS Can Collect Tax
A CPA who understands the CSED calculates the expiration date for each tax year you owe and factors it into the overall strategy. Sometimes CNC status while the clock runs down is the smartest move. Other times, an installment agreement makes more sense even though it pauses the clock, because the monthly payments are manageable and you avoid lien filings. The CSED math shapes every decision.
Stopping a Lien or Levy
When you owe back taxes and do not pay after the IRS sends a demand, the IRS can file a Notice of Federal Tax Lien, which attaches to all your property and alerts creditors that the government has a legal claim. The IRS generally files a lien when the unpaid balance reaches $10,000 or more, though it may file below that threshold in certain circumstances.16Internal Revenue Service. 5.12.2 Notice of Lien Determinations
Tax liens no longer appear on credit reports; the three major credit bureaus stopped including them in 2018. The lien remains a public record, so lenders, landlords, and employers searching county records can still find it. A lien also creates practical problems when you try to sell property or refinance a mortgage, because the IRS’s claim must typically be satisfied before the transaction closes.17Internal Revenue Service. Understanding a Federal Tax Lien
A CPA can help get a lien withdrawn in certain situations. If you owe $25,000 or less and enter into a Direct Debit Installment Agreement, you can request that the IRS withdraw the Notice of Federal Tax Lien. If your balance is above $25,000, you may be able to pay it down to that threshold and then request withdrawal.17Internal Revenue Service. Understanding a Federal Tax Lien
If the IRS issues a notice of intent to levy your wages, bank accounts, or other property, you have the right to request a Collection Due Process hearing by filing Form 12153. A timely CDP request stops the IRS from proceeding with the levy in most cases and suspends the 10-year collection clock.18Internal Revenue Service. Request for a Collection Due Process or Equivalent Hearing, Form 12153 At the hearing, you can argue you are not liable for the tax, that you already made payments the IRS did not apply, or that you want to propose a collection alternative like an installment agreement or OIC. You can also request lien withdrawal or penalty abatement. A CPA representing you at the hearing can advocate for the resolution that best fits your situation.
Miss the CDP deadline and you can still request an equivalent hearing, but you lose two protections: the levy is not stopped, and the collection statute is not suspended. The deadline for the equivalent hearing is one year from the date of the levy notice.
One More Deadline Worth Knowing
If the IRS owes you a refund for any unfiled year, you have a limited window to claim it. You must file the return within three years of the original due date (including extensions) to get the refund. After that, the money belongs to the Treasury permanently.19Internal Revenue Service. Time You Can Claim a Credit or Refund20Office of the Law Revision Counsel. 26 USC 6511 – Limitations on Credit or Refund
People with multiple unfiled years sometimes owe for some years and are owed refunds for others. A CPA identifies the refund years early and prioritizes filing them before the three-year window closes. Those refunds can then offset what you owe for other years, reducing the net balance.
What Hiring a CPA Costs
Fees vary widely depending on the complexity of your situation, the number of unfiled years, and the resolution strategy. Most CPAs charge either a flat fee per return and per resolution type, or bill hourly. Initial investigation work (pulling IRS transcripts and creating a resolution plan) commonly runs from several hundred to over a thousand dollars before substantive work begins.
Beyond professional fees, the IRS charges its own fees for certain programs. Installment agreement setup fees range from $22 to $178 depending on how you apply and whether you use direct debit. OIC applications require a $205 fee plus a potentially substantial initial payment, particularly the 20% lump-sum requirement.12Internal Revenue Service. Offer in Compromise Low-income taxpayers may qualify for waivers on both installment agreement fees and OIC application costs.10Internal Revenue Service. Payment Plans Installment Agreements
A single successful First Time Abatement on a large balance can save more than the entire cost of hiring the CPA, and the penalty relief, interest savings, and avoided enforcement actions competent representation produces usually make the fees worth it.