Trump’s Proposed 10% Credit Card Interest Cap: Could Paying the IRS With a Card Save You Money?

Important: This article is general information only and not tax or legal advice. Interest rates and penalty rules vary by situation and can change. Always confirm your options with a qualified professional.

Trump Floated a 10% Credit Card Interest Cap — What We Know So Far

On Friday, President Donald Trump called for a one-year cap of 10% on credit card interest rates (APR), reportedly starting January 20. Analysts have noted that implementing a rate cap would likely require action by Congress, and there are open questions about how (or whether) it could be enforced.

But whether it becomes law or not, it raises a practical question for anyone who owes the IRS:

If my credit card APR were capped at 10%, would it ever make sense to pay the IRS with a credit card to stop IRS penalties and interest?

How the IRS Adds Cost When You Don’t Pay (or Don’t File)

When you owe and don’t pay on time, the IRS can add interest and penalties. The details matter because the IRS cost isn’t just “one APR.” It’s a stack.

1) IRS Interest (Example: 7% per year in early 2026)

For the first quarter of 2026, the IRS underpayment interest rate for individuals was announced at 7% per year, compounded daily. IRS interest rates are set quarterly (they can change over time).

Monthly translation: 7% annually is roughly ~0.58% per month (very roughly; the IRS compounds daily).

2) Failure-to-Pay Penalty (0.5% per month)

If you filed your return but didn’t pay the tax due, the failure-to-pay penalty is generally 0.5% per month (or part of a month), up to a maximum of 25% of the unpaid tax.

Monthly translation: 0.5% per month is ~6% per year, before interest and compounding.

Note: If you filed on time and enter an approved payment plan, the IRS states this penalty can be reduced to 0.25% per month during the plan.

3) Failure-to-File Penalty (5% per month)

If you don’t file your return on time and you owe tax, the IRS can charge a failure-to-file penalty that is usually 5% per month (or part of a month), up to 25% of the tax due.

When You Don’t File AND Don’t Pay: The “5% Per Month” Shock

If both penalties apply in the same month, the IRS explains that the combined penalty is generally 5% per month (made up of 4.5% late filing + 0.5% late payment) for each month your return is late, up to 25%.

After that late-filing maximum is reached, the failure-to-pay penalty generally continues while the tax remains unpaid.

Bottom line: If you haven’t filed and you owe, your balance can grow much faster than people expect — especially in the first few months.

Where the 10% Card Cap Changes the Math

A 10% APR credit card (if capped) would translate to roughly ~0.83% per month in interest (again, rough translation; card issuers also compound). Compare that to common IRS “carrying costs”:

• Filed but didn’t pay: IRS interest (~0.58%/mo at 7% annual) + failure-to-pay penalty (0.5%/mo) ≈ ~1.1% per month (roughly).

• Didn’t file and didn’t pay: combined penalties can be ~5% per month early on (plus interest).

This is why the idea matters: in some situations, a lower capped credit card APR could be cheaper than letting IRS penalties stack.

Example Math: $10,000 IRS Balance — 6 Months vs 12 Months

These are illustrative estimates to show how the math works. Real totals can be higher because the IRS charges interest on penalties too, and timing matters (the IRS charges full-month penalty increments even if you pay before the month ends).

Assumptions for the example

• IRS underpayment interest: 7% annual (compounded daily).

• Failure-to-pay penalty: 0.5% per month.

• If unfiled: combined penalty 5% per month for the first 5 months, then 0.5% per month thereafter.

• Credit card APR (hypothetical cap): 10% APR.

• IRS credit card processing fee example: ~1.75% (varies by processor and card type).

• Simple scenario: you carry the card balance for 6 or 12 months (worst-case). If you pay it down monthly, the card interest would be less.

Scenario A: You filed on time, but you didn’t pay the IRS

TimeEstimated IRS add-on cost (interest + failure-to-pay)Estimated credit card cost at 10% (interest + ~1.75% fee)Difference

6 months~$655~$686Card is ~+$31 (slightly higher due to fee)

12 months~$1,325~$1,226Card saves ~-$99

Interpretation: If you filed on time, the card-vs-IRS comparison can be close — especially once you factor in card processing fees. This is where an IRS payment plan (with reduced penalties) may compete very well.

Scenario B: You did NOT file, and you did NOT pay

TimeEstimated IRS add-on cost (interest + penalties)Estimated credit card cost at 10% (interest + ~1.75% fee)Potential savings

6 months~$2,905~$686~$2,219

12 months~$3,575~$1,226~$2,349

Interpretation: This is where the math can become dramatic. If you haven’t filed and you owe, the early-month penalty stacking can make “do nothing” extremely expensive. Paying the IRS (by any method) stops the IRS meter — and financing it at a hypothetically capped 10% APR could, in some cases, be far cheaper than letting penalties compound.

Important Caveats Before You Pay the IRS With a Credit Card

• The 10% cap is only a proposal. It may never become law, and the details matter (who it applies to, how it’s enforced, and for how long).

• Credit card fees are real. The IRS uses third-party processors who charge convenience fees (the IRS doesn’t receive these fees). Consumer credit card fees can be around ~1.75%, and some card types can cost more.

• Your card APR may jump. Late payments can trigger penalty APRs, fees, and credit score impacts.

• Better option for many taxpayers: Filing on time and setting up an IRS payment plan may reduce the failure-to-pay penalty during the plan (per IRS guidance), potentially making it cheaper than using a credit card.

• Points aren’t “free money” if you carry the balance. Rewards are often outweighed by interest if you can’t pay it off.

What You Should Take Away

• If you owe the IRS, filing matters — not filing is where penalties can stack quickly.

• Even when you file, the IRS can add interest + monthly penalties.

• If a true 10% card APR cap ever existed, it could make “pay the IRS now, finance on a card” a legitimate math conversation for some taxpayers — especially those facing late-filing exposure.

How Tax Advocate Group Can Help

At Tax Advocate Group, we help taxpayers choose the best next step based on what’s actually happening in their case:

• Are you filed? If not, what’s the fastest way to get compliant?

• Is an IRS payment plan a better fit?

• Do you qualify for hardship status or a different resolution strategy?

• What is your true cost of waiting (penalties + interest + risk)?

If you received a notice or you’re unsure how much the IRS is adding each month, contact us for a review of your options.