When money gets hard
You owe money you did not expect
Start here
When your return shows a bill you cannot pay, file on time anyway. The late-filing penalty is ten times the late-payment penalty.
First: file by the deadline and pay whatever you can with the return. Then ask the IRS for a payment plan online and choose direct debit, which costs $29 to set up instead of as much as $178.
Watch the date: interest (7% a year for the fourth quarter of 2026) starts building from the due date, and a late-payment penalty of 0.5% a month applies once the deadline passes (IRS, Interest and Failure to pay penalty). They keep growing until you pay in full, even while you are on a plan.
A short-term IRS payment plan costs nothing to set up. A long-term plan costs $29 applied for online and paid by direct debit, or $178 arranged by phone and paid another way — the same debt, six times the fee.
Source: IRS, Payment plans and installment agreements, current for 2026.
File first, pay second
Not filing and not paying are two separate failures, and the first is the expensive one. File by the deadline even if you are sending nothing with it.
Pay whatever you can with the return. Every dollar paid now is a dollar not accruing interest and penalties.
An extension to file is not an extension to pay. Interest and the late-payment penalty still start after the deadline.
What an unpaid bill really costs
Three meters can run on a balance: interest, a late-payment penalty, and, if you did not file, a late-filing penalty.
Interest is 7% a year, compounded daily, for the fourth quarter of 2026. The rate resets every quarter (IRS news release). The late-payment penalty is 0.5% of the unpaid tax per month, up to 25%. The late-filing penalty is 5% per month, up to 25% (IRS penalty pages).
Example on a $1,000 bill, before interest: filing on time and paying nothing for five months adds about $25. Filing five months late adds about $550, because once a return is more than 60 days late the minimum late-filing penalty applies ($525 for returns due after 2025, or the full tax if that is smaller).
A payment plan helps: if you filed on time, the late-payment rate drops to 0.25% a month while you are on a plan (IRS). Setup fees come on top.
Ignoring IRS notices is costly. The rate jumps to 1% a month if you do not pay within 10 days after a notice of intent to levy.
The two plans
A short-term plan runs up to 180 days, for balances under $100,000 including penalties and interest, with no setup fee.
A long-term plan — an installment agreement — covers balances of $50,000 or less and can be set up online. The fee depends entirely on how you apply and how you pay.
The fee is decided by how you sign up
Applying online and paying by direct debit costs $29. The same plan arranged by phone and not paid by direct debit costs $178.
Same debt, same terms, six times the fee. If your adjusted gross income is at or below 250% of the federal poverty level, the setup fee is waived for a direct debit plan, and if you cannot use direct debit, the $43 fee may be reimbursed if you meet the IRS conditions (IRS, Payment plans). If the IRS has not marked you as low income, you can ask for this with Form 13844 within 30 days of your plan's acceptance letter.
What a plan does not do
A payment plan keeps you out of collections. It does not stop the clock — interest and penalties keep running on what you still owe.
Pay it off faster than the plan requires if you can, and compare the IRS rate against a credit card before reaching for one. The IRS rate is often cheaper. See Section 38.
Then fix the cause
An unexpected bill often has one of three causes: too little withheld, income with no withholding at all, or a second job. See Section 50 for the first and Section 20 for the second.
Fixing it is the difference between a one-off and an annual event.
What you can do, in order
- File by the deadline even with $0 to send.
- Pay whatever you can with the return.
- If you can pay within 180 days, ask for the short-term plan, which has no setup fee. Penalties and interest still run.
- For longer, apply online and choose direct debit. That is the $29 version.
- If money is tight, check the IRS low-income setup-fee rules (250% of the poverty level) before you apply, and file Form 13844 if the IRS does not apply them for you.
- Open every IRS notice right away, and respond by the due date if it asks for something. Work out which of the three causes produced the bill, and fix that.
Where to check this yourself
irs.gov for payment plans, installment agreements and current penalty and interest rates.