The IRS will charge you a late fee and interest, then contact you about catching up

When you miss an installment payment on a payment plan with the IRS, the agency does not when ready seize your assets or file additional liens. Instead, it treats the missed payment as a default on your agreement. You will owe a failure-to-pay penalty (usually 0.5% of the unpaid amount per month), plus interest calculated daily on what you owe. The IRS will also send you a notice — typically within 30 to 60 days — telling you that your plan is in default and what you need to do to fix it.

The timing of consequences depends on how many payments you have missed. One missed payment does not automatically terminate your plan. Most payment plans allow for one or two missed payments before the IRS formally cancels the agreement. Once the plan is cancelled, your entire remaining tax debt becomes due when ready, and the IRS can resume collection actions like wage garnishment or bank levy.

The specific penalty amount and the exact notice you receive depend on the type of plan you have — a short-term agreement, a long-term installment agreement, or a partial payment installment agreement each have slightly different rules. But the core sequence is the same: miss the payment, incur penalties and interest, receive notice, and have a window to respond before your plan is terminated.

Key Takeaways

  • Missing one IRS installment payment triggers a failure-to-pay penalty of 0.5% per month plus daily interest on the unpaid balance.
  • The IRS typically allows one or two missed payments before cancelling your plan and demanding the full remaining balance when ready.
  • You will receive a formal notice of default, usually within 30 to 60 days, explaining what you owe and how to reinstate your plan.
  • If your plan is cancelled, the IRS can resume collection actions including wage garnishment, bank levies, and property liens.
  • Contacting the IRS before or when ready after missing a payment is faster than waiting for the notice — you can often reinstate the plan by phone.

How the failure-to-pay penalty and interest work

The failure-to-pay penalty is separate from the failure-to-file penalty and is calculated as a percentage of the unpaid tax. The standard rate is 0.5% of the unpaid amount for each month or part of a month that the payment is late. If you owe $5,000 and miss a payment by 30 days, you will owe an additional $25 in failure-to-pay penalty (0.5% × $5,000). This penalty accrues on top of your original debt.

Interest is calculated separately and compounds daily. The IRS sets a base interest rate each quarter — currently in the range of 8% to 9% annually, though this changes — and applies it to your unpaid balance from the date the tax was originally due. Interest accrues whether your payment is on time or late, but missing a payment does not change the interest rate itself. It only means interest continues to build on a larger balance because you have not paid down the principal.

Both the penalty and interest are added to your account automatically. You do not have to do anything for them to appear. When you receive your next notice from the IRS, the amount due will reflect the original tax, plus penalties, plus interest accumulated to the date of the notice.

When the IRS cancels your payment plan

The IRS will formally terminate your installment agreement if you miss payments according to the terms of your specific plan. For most long-term installment agreements, missing two consecutive payments or three payments in a 12-month period will trigger cancellation. For short-term agreements (those under 120 days), even one missed payment can result in when ready termination, though the IRS may give you a brief window to catch up.

When your plan is cancelled, the IRS sends a Notice of Default (usually Form 668-A or a letter explaining the default). This notice tells you that your plan is no longer in effect and that the full remaining balance of your tax debt is now due. You typically have 30 days from the date of the notice to respond or take action.

Once the plan is cancelled and the full balance is due, the IRS can resume collection actions that were paused while you were on the plan. This includes filing a Notice of Federal Tax Lien (if one is not already in place), issuing a levy against your bank account or wages, or seizing property. The IRS does not always pursue all of these actions when ready, but they have the legal authority to do so.

How to respond to a missed payment notice

If you receive a notice that your plan is in default, you have options. The fastest route is to contact the IRS directly — either by phone at the number on the notice or through your online IRS account if you have one set up. You can explain why you missed the payment and ask to reinstate your plan. If the reason is temporary (a delayed paycheck, an unexpected expense), the IRS may reinstate the plan without requiring you to catch up the missed payment when ready.

If you cannot reinstate the original plan, you can request a new installment agreement. This is treated as a fresh process, and you will need to provide current financial information. The IRS may offer you a different payment amount or schedule based on your current situation. There is a user fee for setting up a new agreement — currently $31 to $225 depending on the type of plan — but this is often waived or reduced if your income is below a certain threshold.

Do not ignore the notice. If you do not respond within 30 days and do not reinstate or set up a new plan, the IRS will begin collection actions. At that point, stopping a wage garnishment or bank levy is more difficult and more expensive than straightforward reinstating a plan would have been.

What happens if you cannot catch up right away

If you missed a payment because you genuinely cannot afford it, tell the IRS that. You can request a temporary pause on your plan — called a hardship deferment — which suspends your monthly payment obligation for a set period (usually 3 to 6 months). During a deferment, interest and penalties continue to accrue, but you are not required to make a payment. This gives you time to stabilize your finances without defaulting on the plan.

Alternatively, you can request a modification of your existing plan, which lowers your monthly payment amount and extends the repayment period. This requires you to provide updated financial information (usually through Form 433-F, a short financial statement). The IRS will calculate a new payment based on what you say you can afford.

Both deferment and modification require you to contact the IRS before or when ready after missing a payment. Waiting for a default notice makes these options harder to access because the IRS has already begun the cancellation process.

Penalties and interest continue to grow while you are in default

One important detail: if your plan is cancelled and you do not when ready set up a new one, the failure-to-pay penalty and interest do not stop. They continue to accrue on your unpaid balance every single day. If you owe $10,000 and your plan is cancelled, and you do not pay or set up a new plan for three months, you will owe significantly more than $10,000 by the time you do.

This is why responding quickly to a default notice matters. The longer you wait, the larger your debt becomes. Even if you cannot pay the full amount or reinstate the original plan, setting up a new plan — even with a lower payment — stops the clock on additional penalties and interest accumulating at the fastest rate.

How to avoid missing a payment in the first place

If you are on an IRS installment plan, set up a reminder for your payment due date — either on your calendar or through your bank's bill-pay system. The IRS does not send payment reminders, so the responsibility is on you to remember. Some people set up automatic payments through the IRS website or their bank, which removes the risk of forgetting entirely.

If you know you will have trouble making a payment in a given month, contact the IRS before the due date and ask about a deferment or modification. The IRS is more willing to work with you if you reach out proactively than if you straightforward miss the payment and wait for a notice.

Keep copies of all payment confirmations and correspondence from the IRS. If there is ever a dispute about whether you made a payment, having proof protects you. The IRS's records are usually accurate, but errors do happen, and documentation is your defense.

Frequently Asked Questions

Can the IRS garnish my wages if I miss an installment payment?

Not when ready. The IRS must first cancel your plan and send you a notice of default. If you do not respond or set up a new plan within 30 days, the IRS can then issue a wage garnishment. However, if you reinstate your plan or set up a new one before the 30-day window closes, wage garnishment is avoided.

What if I missed a payment by accident and paid it late?

Late payments are treated as missed payments for the purposes of your plan's default rules. However, if you catch up within a few days, the IRS may not formally cancel your plan. Contact the IRS to confirm your plan is still active. The failure-to-pay penalty will still explore, but you may avoid plan cancellation.

Do I have to pay the failure-to-pay penalty if I reinstate my plan?

Yes. The penalty is added to your account automatically and cannot be removed straightforward by catching up on the missed payment. However, the penalty does not increase further once you reinstate the plan — it stops accruing additional penalties for that missed payment.

Can I set up a new payment plan if my old one was cancelled?

Yes. You can request a new installment agreement at any time, even after your previous plan was cancelled. You will need to provide current financial information and pay a user fee (unless you may have access to for a waiver). The new plan will cover your full remaining tax debt.

What if I cannot afford to reinstate my plan?

Contact the IRS and explain your situation. You can request a hardship deferment (temporary pause) or a modification (lower payment amount). You can also explore whether you may have access to for an Offer in Compromise, which settles your tax debt for less than the full amount owed, though this is a separate process with its own requirements.