The IRS payment plan is cheaper. You'd pay $1,568 total versus $2,304 for the 14% personal loan, saving $736 over 3 years.
The math
Inputs
| Tax bill | $10,000 |
|---|---|
| IRS plan length | 36 months (3 years) |
| Personal loan | 14% APR over 36 months (3 years) |
| Loan origination fee | 0% |
The formula in words
IRS plan: each month add IRS interest (compounded daily) on the balance and a 0.25% failure-to-pay penalty on the unpaid tax, then find the fixed payment that clears it in 36 months. Loan: pay the IRS in full on day one, so IRS interest and penalties stop; loan payment = amount × r ÷ (1 − (1 + r)^−n) with r = APR ÷ 12. Compare total interest, penalties and fees.
Step by step
| Option | Monthly payment | Interest | Penalty | Fees | Total cost |
|---|---|---|---|---|---|
| IRS payment plan | $320.53 | $1,137 | $403 | $29 | $1,568 |
| Loan at 14% | $341.78 | $2,304 | $0 | $0 | $2,304 |
| Month | Starting balance | Interest | Failure-to-pay penalty | Payment | Ending balance |
|---|---|---|---|---|---|
| 1 | $10,000.00 | $59.62 | $25.00 | $320.53 | $9,764.09 |
| 2 | $9,764.09 | $56.33 | $24.20 | $320.53 | $9,524.09 |
| 3 | $9,524.09 | $56.79 | $23.40 | $320.53 | $9,283.74 |
| Year | Paid | Interest | Penalty | Balance at end |
|---|---|---|---|---|
| Year 1 | $3,846 | $608 | $247 | $7,008 |
| Year 2 | $3,846 | $387 | $132 | $3,681 |
| Year 3 | $3,846 | $142 | $24 | $0 |
Result
- IRS plan: monthly payment: $320.53
- IRS plan: interest: $1,137
- IRS plan: failure-to-pay penalty: $403
- IRS plan: total cost (interest + penalty + setup fee): $1,568
- Loan: monthly payment: $341.78
- Loan: total interest: $2,304
- Loan: total cost (interest + fee): $2,304
- Cheaper option: IRS payment plan
- Amount saved with the cheaper option: $736
Assumptions
- The plan starts October 1, 2026 with $10,000 owed, of which $10,000 is tax, and every payment is made on time.
- IRS interest compounded daily at the individual underpayment rate (irs.gov quarterly interest rates): 7% from October 1, 2026. Rates after December 31, 2026 aren't set yet and are assumed to stay at 7%.
- A failure-to-pay penalty of 0.25% a month while the plan is in effect, which applies if you filed on time (it's 0.5% otherwise), capped at 25% of the tax.
- Payments are applied to tax first, then penalties and interest, as the IRS generally does.
- A $29 setup fee (long-term plan applied for online with direct debit, irs.gov). Applying by phone, mail or in person costs more, and low-income taxpayers can have the fee waived.
- The loan is used to pay the full tax bill the day the plan would have started, with a fixed rate and no prepayment.
- Loan approval and your actual rate depend on your credit and income.
- These are estimates that show how the math works, not financial, tax or legal advice. Lenders, card issuers and the IRS can calculate slightly differently.
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What the $736 savings actually means for you
Over 3 years, choosing the IRS payment plan keeps $736 in your pocket compared with a 14% personal loan. That's real money, but the monthly difference is small: $320.53 versus $341.78. The loan costs you more each month, and that gap adds up to the $736 total savings.
If your budget is tight, the IRS plan wins on both fronts: lower monthly payment and lower total cost. The trade-off is that you stay in a payment relationship with the IRS for the full 3 years, and you have to keep every payment on time. The loan pays the tax bill off on day one, so the IRS stops charging interest and penalties immediately, but you swap that for a fixed loan payment at 14%.
Neither option is free. The IRS plan still costs $1,568 in interest, penalties and the setup fee. The loan costs $2,304 in interest. The question is which cost you can live with and manage reliably.
What drives the difference: interest rate and penalties
The IRS plan charges interest compounded daily at 7% and a failure-to-pay penalty of 0.25% a month while the plan is in effect. The loan charges 14% APR. Even though the IRS adds a penalty on top of interest, the combined cost is lower than the loan's 14% rate over the same 36 months.
The loan's higher rate is the main reason it costs more. Because you pay the IRS in full on day one, you avoid the IRS interest and penalties entirely, but you pay 14% to the lender instead. That rate is roughly double the IRS interest rate, and the penalty adds only a small amount each month compared with the rate difference.
Another factor is the setup fee. The IRS plan includes a $29 setup fee when you apply online with direct debit. The loan has no origination fee in this comparison. Even with that fee, the IRS plan is still cheaper by $736.
Your actual loan rate depends on your credit and income. If a lender offers you a lower rate, the math could change. But at 14%, the IRS plan is the cheaper path.
How to change the outcome with the numbers you have
You can't change the IRS interest rate or the failure-to-pay penalty in this comparison. Those are set. But you can change how long you take to pay and which option you choose.
- Shorten the IRS plan: The results assume 36 months. A shorter plan means higher monthly payments but less total interest and penalties. The $736 savings could grow if you pay faster.
- Get a lower loan rate: If you qualify for a personal loan below 14%, the loan could become competitive. At 14%, it is not.
- Avoid the failure-to-pay penalty: The penalty applies while the plan is in effect. Staying on time and meeting the plan terms keeps it from growing beyond the $403 shown.
- Check the setup fee: The $29 fee is for applying online with direct debit. Other application methods cost more, and low-income taxpayers can have the fee waived. That changes the total cost slightly.
If you can pay the bill in full without borrowing, you avoid both the IRS interest and penalties and the loan interest. But if you need time, the IRS plan is cheaper than a 14% loan over 3 years.
Practical next steps before you decide
First, confirm your actual tax bill and whether you filed on time. The penalty rate in this comparison is 0.25% a month, which applies if you filed on time. If you did not, the penalty is higher, and the IRS plan could cost more than shown.
Second, check current IRS interest rates. The 7% rate is assumed to stay the same after December 31, 2026, but rates are not set yet. A change could affect the total cost of the IRS plan.
Third, get a real loan quote. The 14% rate is an example. Your lender will tell you the actual APR and any fees. Compare that offer with the IRS plan numbers here.
Fourth, apply for the IRS plan online with direct debit to get the $29 setup fee. If you qualify as low-income, ask about a fee waiver.
Finally, run your own numbers or ask a tax professional. These are estimates that show how the math works, not financial, tax or legal advice. The IRS and lenders can calculate slightly differently.
Frequently asked questions
Can I get a lower monthly payment with the IRS plan?
The IRS plan payment is $320.53 for 36 months. A longer plan would lower the monthly payment but increase total interest and penalties. A shorter plan raises the monthly payment but reduces total cost. The IRS may require a collection information statement to approve a longer term.
What happens if I miss an IRS payment?
The failure-to-pay penalty is 0.25% a month while the plan is in effect, and it can increase if you miss payments. The IRS may also terminate the plan and demand full payment. Staying on time keeps the penalty at the rate used in this comparison.
Is the 14% personal loan rate fixed?
The comparison assumes a fixed rate with no prepayment. Your actual rate depends on your credit and income. If you qualify for a lower rate, the loan could cost less. At 14%, the loan costs $2,304 in interest over 36 months.
Does the IRS plan affect my credit?
An IRS payment plan does not directly appear on your credit report, but a tax lien could if you default. A personal loan appears on your credit report and adds to your debt. The comparison does not include credit score effects.
Can I pay off the IRS plan early?
Yes, you can pay more than the monthly amount or pay in full at any time. Paying early reduces the interest and penalties you owe. The $1,568 total cost assumes you take the full 36 months.