Your return is finished, it says you owe $2,400, and your checking account has $600 in it. The instinct is to close the laptop and deal with it in the summer. That is the expensive one. Here is what the IRS charges, what it will agree to, and what happens if you say nothing.
Two Penalties, Not One
The IRS charges separately for filing late and for paying late.
The failure to file penalty is 5 percent of the unpaid tax for each month or part of a month your return is late, capped at 25 percent. The failure to pay penalty is 0.5 percent of the unpaid tax per month, also capped at 25 percent. One is ten times the other, and the bigger one is free to avoid. You file.
When both apply in the same month, the filing penalty is reduced by the paying penalty, so the combined charge is 5 percent a month rather than 5.5. The filing penalty hits its ceiling after five months. The paying penalty keeps going.
There is a floor too. File more than 60 days late and the minimum penalty is a set dollar amount the IRS adjusts for inflation, or 100 percent of the tax, whichever is smaller. On a small balance that is the whole tax.
The Same $3,000 Bill, Filed and Unfiled
Say you owe $3,000 in April and pay nothing for five months.
You filed on time. Only the failure to pay penalty applies: 0.5 percent of $3,000 is $15 a month, so $75 after five months.
You never filed. The combined rate applies: 5 percent of $3,000 is $150 a month, so $750 after five months, at which point the filing penalty maxes out.
Same tax, same five months of not paying, ten times the penalty. From month six both accrue at $15 a month, but the unfiled return stays $675 behind.
Interest Runs On Top of Everything
Penalties are not the whole bill. The IRS charges interest on unpaid tax from the original due date until the balance is cleared, and on the penalties as well.
For individuals the rate is the federal short term rate plus 3 percentage points, reset quarterly, and it compounds daily, so the balance grows even in months when no new penalty is added. Interest is also the hardest charge to shed. The IRS reduces it only for its own error or delay.
File On Time, Then Pay What You Can
Two moves, in this order.
File by the deadline no matter what your bank balance says. It costs nothing and switches off the larger penalty permanently. Form 4868 buys six more months to file and no extra time to pay. People misread that as a payment extension every year.
Then pay whatever you can toward the balance. Both the failure to pay penalty and the interest are calculated on what is still unpaid, so a $500 payment against a $2,400 bill shrinks every future charge. There is no minimum.
Short Term Plans and Installment Agreements
If you cannot clear the balance, the IRS will put you on a schedule. Most people apply online at IRS.gov and get an answer immediately.
A short term payment plan gives you up to 180 days to pay in full, with no setup fee. Penalties and interest keep accruing until the balance hits zero, so this is the cheap option when money is coming.
A long term payment plan, formally an installment agreement, gives you monthly payments instead. It carries a setup fee, lower with direct debit, and waived or refunded under the IRS low income threshold. The fees and the balance ceilings for applying online change, so read the current numbers on the application page. Above that ceiling you can still get an agreement by paper (Form 9465) or phone.
If you filed on time and the IRS approves your plan, the failure to pay penalty drops from 0.5 percent a month to 0.25 percent while the plan is in effect. You cannot get a plan until every required return is in.
What an Offer in Compromise Actually Is
An offer in compromise settles your tax debt for less than the full amount. It is real, and nothing like the radio ads.
The IRS adds up your income, your expenses and the equity in what you own, then works out what it could collect before the debt expires. That figure is your reasonable collection potential. Offer at least that much and the IRS will usually take it. If you have a steady paycheck and any equity, that number is often the whole balance, and the answer is no.
Which is why "settle your tax debt for pennies on the dollar" firms sit on the IRS list of the year's worst tax scams. The pattern is a large upfront fee for an offer the firm knows will fail. You get the same forms and rules whether you pay one or not.
Check yourself first with the Offer in Compromise Pre-Qualifier, a free tool on IRS.gov. Filing one costs a non-refundable application fee plus an initial payment, both waived under the low income threshold, and the IRS accepts well under half of the offers it receives.
If you have no income the IRS can reach and nothing to sell, ask about currently not collectible status. Collection stops, but the debt stays and interest keeps building. It is a pause, not an exit.
Asking the IRS to Remove a Penalty
Penalties come off more often than people expect, by two routes.
First time abate is close to automatic. If you have filed your required returns, paid or arranged to pay the tax, and kept a clean penalty record for the prior three years, the IRS can wipe both penalties for one year. You have to ask. Call the number on the notice and ask for it by name.
Reasonable cause is the other route, and it needs facts: a serious illness, a death in the immediate family, a fire or natural disaster, records you could not get. Not having the money is not itself reasonable cause for paying late, though whatever caused you not to have it might be.
Neither route touches the tax itself, and neither removes much interest.
What Happens If You Keep Ignoring It
The IRS starts with letters, and the letters escalate.
Any refund from a later year goes to the old balance automatically, until the debt is gone. The IRS can file a Notice of Federal Tax Lien, a public claim on everything you own, including property you buy afterward. The credit bureaus have left tax liens off credit reports since 2018, but a lien still surfaces when you sell a house or borrow against one.
A levy is the step past a lien: the IRS takes the money. It can garnish your wages, empty a bank account, or seize and sell a vehicle. First it has to send a Final Notice of Intent to Levy and Notice of Your Right to a Hearing, then wait 30 days. That notice is not junk mail, it is a countdown. A large enough unpaid balance can also get your passport revoked or an application denied.
All of it stops once there is a filed return and a plan behind it. The fix is boring: file, pay something, apply online for a plan the same afternoon.
