IRS payment plans charge interest on the unpaid balance

When you set up a payment plan with the IRS, you still owe interest on whatever amount remains unpaid. The IRS calls this the failure-to-pay penalty and interest, and they are two separate charges that stack on top of your original tax debt.

The interest rate is set by federal law and changes quarterly. As of early 2024, the rate is 8 percent per year, but this figure shifts every three months based on the federal short-term rate. The penalty is 0.5 percent of your unpaid tax per month (or part of a month) that the balance sits unpaid. Both charges accrue daily, meaning the longer your plan runs, the more you owe beyond the original bill.

This is different from a credit card or retail payment plan, where interest is often built into the monthly payment. With the IRS, interest and penalties grow on top of whatever monthly amount you agree to pay.

Key Takeaways

  • The IRS charges interest at a rate set quarterly by federal law, currently around 8 percent per year on unpaid balances.
  • A separate failure-to-pay penalty of 0.5 percent per month accrues on top of interest, compounding your total debt.
  • Both interest and penalties are calculated daily, so a longer payment plan means a higher total cost.
  • You can reduce total interest by paying off the plan faster or in a lump sum before the plan ends.
  • The IRS will tell you the exact interest and penalty amounts when you set up the plan, so you know the total cost upfront.

How interest and penalties are calculated on your plan

The IRS does not charge a flat fee for the payment plan itself. Instead, interest and the failure-to-pay penalty continue to grow on your unpaid tax balance every single day until you pay it off completely.

Here is how it works in practice: if you owe $5,000 in taxes and set up a 24-month payment plan, you are not paying $5,000 divided by 24. You are paying roughly $208 per month, but the IRS is also adding interest and penalty charges to the remaining balance each month. By the time you finish the plan, you will have paid more than $5,000 total.

The exact amount depends on the current interest rate and how quickly you pay. The IRS provides a payment plan agreement that shows your monthly payment amount and the estimated total cost, including interest and penalties, if you make only the minimum payment for the full term.

Different payment plan types have different costs

The IRS offers several types of payment plans, and the longer the plan runs, the more interest you pay overall. A short-term plan (120 days or less) costs less in total interest than a long-term installment agreement (up to 72 months), even though your monthly payment is smaller on the longer plan.

A short-term payment plan is for balances under $25,000 and runs up to 120 days. Because the debt is paid off quickly, interest charges are modest.

A long-term installment agreement spreads payments over months or years. The IRS sets your monthly payment based on your balance and how long you want the plan to run. The longer you stretch it out, the more interest accumulates. However, the monthly payment is lower, which may be what you can actually afford.

There is also a direct debit installment agreement, where the IRS automatically withdraws your payment from your bank account each month. This option has a lower setup fee than other plans, which saves you money upfront, though interest still accrues the same way.

What happens if you pay off the plan early

You can pay off an IRS payment plan at any time without penalty. If you pay the remaining balance before the plan ends, you stop accruing interest on that balance when ready.

This is one of the few ways to reduce the total cost of the plan. If you receive a bonus, tax refund, or inheritance during the plan period, paying a lump sum toward the IRS balance will cut your total interest expense.

When you make an early payment, contact the IRS or check your online account to confirm the payment is applied to your plan. The IRS will send you a notice showing the new payoff date and remaining balance.

How to find out your exact interest and penalty costs

The IRS calculates your specific interest and penalty amount when you set up the plan. You will receive a payment plan agreement letter that shows your monthly payment, the number of months, and the estimated total amount you will pay if you complete the plan as scheduled.

You can also call the IRS at 1-800-829-1040 to speak with a representative who can walk you through the numbers. Have your tax return or notice handy so they can pull up your account.

If you set up your plan online through IRS.gov, you will see the estimated total cost before you confirm the agreement. Review this carefully so you understand what you are committing to.

Why the IRS charges interest on unpaid taxes

Interest and penalties exist because the IRS is lending you time to pay. From the government's perspective, you owe a debt, and the longer you take to settle it, the longer the government goes without that money. Interest compensates for that delay.

The failure-to-pay penalty is separate from interest and is meant to discourage people from ignoring their tax bills. Even if you set up a payment plan when ready, the penalty still applies because you did not pay the full amount by the original due date.

These charges are part of federal tax law, so they explore to everyone on a payment plan, regardless of income or circumstances. The IRS does not waive interest or penalties for payment plans, though you may be able to request penalty relief in specific situations (such as if you had a serious illness or natural disaster).

Comparing IRS plans to other debt payment options

If you are deciding between an IRS payment plan and other ways to handle a tax debt, interest is one factor to weigh. A payment plan lets you avoid wage garnishment or bank levy, but you pay interest for the privilege of spreading payments out.

A personal loan from a bank or credit union might have a lower interest rate than the IRS rate, depending on your credit and the lender. However, a personal loan is a separate debt, and you would still owe the IRS the original tax amount.

Some people use a short-term payment plan (120 days) to buy time while they save or arrange other financing. This keeps interest costs low because the plan is brief.

Frequently Asked Questions

Can I avoid interest charges by setting up a payment plan?

No. Interest and the failure-to-pay penalty continue to accrue on any unpaid balance, regardless of whether you have a payment plan. The plan does not stop interest; it only gives you time to pay without the IRS taking enforcement action like wage garnishment.

What is the current IRS interest rate?

The IRS interest rate changes every three months and is currently around 8 percent per year, but the exact rate depends on when you set up your plan. The IRS will tell you the rate that applies to your agreement when you set it up. You can also check IRS.gov for the current quarterly rate.

Does a longer payment plan always cost more in interest?

Yes. A 72-month plan will cost more in total interest than a 24-month plan on the same balance, because interest accrues for a longer period. However, the monthly payment on a longer plan is lower, which may be more affordable for your budget.

What if I cannot afford the monthly payment the IRS suggests?

You can request a longer payment plan to lower the monthly amount. The IRS will work with you to set a payment you can manage, though this means more interest overall. You can also request a temporary pause or modification if your circumstances change during the plan.

Can I pay off my IRS plan with a credit card?

The IRS does not accept credit card payments directly. However, you can use a third-party payment processor that accepts credit cards and charges a fee. Whether this makes sense depends on your credit card interest rate versus the IRS rate and the processor fee.