An advance payment of tax is money you send to the IRS before you file your tax return

An advance payment of tax is a payment you make to the Internal Revenue Service (IRS) during the year, rather than waiting until you file your tax return in April. The IRS calls this a payment voucher or sometimes an estimated tax payment when you're self-employed or have income the IRS doesn't automatically withhold from.

The simplest way to think about it: the IRS wants its money throughout the year, not all at once in April. If you're an employee and your employer withholds taxes from your paycheck, those are advance payments happening automatically. If you're self-employed, a contractor, or have investment income, you make these payments yourself.

When you file your return, the IRS adds up all the advance payments you made during the year and subtracts that total from what you actually owe. If you paid too much, you get a refund. If you paid too little, you owe the difference.

Key Takeaways

  • An advance payment of tax is money you send the IRS during the year, before filing your return in April.
  • Employees have advance payments made automatically through paycheck withholding; self-employed people and contractors usually make quarterly estimated tax payments instead.
  • You can make advance payments by mail with Form 1040-ES, through the IRS Direct Pay system online, or by credit card through an authorized payment processor.
  • The IRS credits your advance payments against your total tax bill when you file, so overpaying means a refund and underpaying means you owe more.
  • Missing an advance payment important date does not trigger a penalty if your total withholding and payments for the year are close enough to what you owe.

Why the IRS collects advance payments throughout the year

The federal government runs on tax revenue, and it needs money continuously to pay for operations. Rather than wait until April to collect all taxes at once, the IRS spreads collection across the year. This is why employers are required to withhold taxes from paychecks — it's the government's way of collecting advance payments from most workers automatically.

For people without an employer doing the withholding — self-employed people, contractors, investors, and retirees with certain income sources — the responsibility falls on you to send money in. These are called estimated tax payments, and they're due four times a year on specific dates.

Who has to make advance payments

If you're a W-2 employee and your employer withholds taxes from your paycheck, you're already making advance payments. You don't need to do anything else unless your situation changes — a second job, a side business, or investment income that isn't being withheld.

You need to make your own advance payments if you're self-employed, a contractor receiving 1099 forms, a business owner, or you have significant income from investments, rental property, or other sources where no employer is withholding. The IRS expects you to pay quarterly — roughly every three months — based on what you estimate you'll owe for the year.

Even if you're an employee with withholding, you might need to make additional advance payments if your withholding isn't enough. This happens when you have a side business, rental income, or a major life change like a spouse's job loss.

The four quarterly payment dates

If you're making estimated tax payments, the IRS sets four important date each year. These dates don't fall on the same calendar day — they're tied to the end of each quarter plus a grace period.

The first payment covers January through March and is due April 15. The second covers April through May and is due June 15. The third covers June through August and is due September 15. The fourth covers September through December and is due January 15 of the following year. If a due date falls on a weekend or holiday, the important date moves to the next business day.

You don't have to make all four payments if you don't have income in every quarter. If you only earned money from January through June, you'd only owe two payments. The key is paying as you earn.

How to make an advance payment

The IRS offers several ways to send money. The fastest and most direct is IRS Direct Pay, available at irs.gov. You log in, enter your payment amount and the quarter it covers, and the IRS deducts the money directly from your bank account on the date you choose. There's no fee, and you get a confirmation number when ready.

You can also pay by credit or debit card through an authorized payment processor. The IRS doesn't charge a fee, but the processor does — typically 1.5 to 2 percent of the payment. This is useful if you want to earn credit card rewards, though the fee usually outweighs the benefit.

The traditional method is mailing a check with Form 1040-ES, the Estimated Tax Worksheet. You fill out the form, write a check, and mail both to the IRS address listed in the form instructions. This takes longer and gives you less proof of payment, so it's less common now.

What happens if you miss a payment or pay the wrong amount

Missing a quarterly important date doesn't automatically trigger a penalty. The IRS only penalizes underpayment if your total advance payments for the year fall short of what you owe by a certain threshold. The threshold changes each year, but generally you're safe if you've paid at least 90 percent of your current year's tax or 100 percent of the previous year's tax (110 percent if your previous year's income was over $150,000).

If you do underpay significantly, the penalty is interest on the unpaid amount, calculated from the original due date. It's not a flat fee — it's a percentage that compounds. The current rate varies but is typically 8 percent annually. You'll see this penalty on your return when you file, and the IRS will bill you for it.

Overpaying is not a problem. If you send more than you owe, the IRS holds the excess and credits it against next year's taxes, or you can request a refund when you file your return.

How advance payments show up on your tax return

When you file your return, you report all the advance payments you made during the year in a section usually called "Payments." This includes withholding from your paychecks, estimated tax payments you sent in, and any other payments the IRS has a record of.

The IRS subtracts your total payments from your total tax liability. If payments exceed what you owe, the difference is your refund (or you can explore it to next year). If your liability exceeds payments, you owe the difference by the filing important date.

The IRS matches your reported payments against their records automatically. If there's a discrepancy — you claim you paid something the IRS doesn't have a record of — they'll contact you. This is why keeping confirmation numbers from online payments and cancelled checks from mailed payments is important.

Frequently Asked Questions

Can I make an advance payment even if I don't owe taxes?

Yes. You can send money to the IRS at any time, even if you don't expect to owe. The IRS will hold it and credit it against future tax bills, or refund it if you never owe. There's no penalty for overpaying.

What if I'm an employee but also self-employed?

Your employer withholds based on your W-2 income only. If your self-employment income is significant, you'll likely need to make estimated tax payments on top of your withholding. You can adjust your W-4 to increase withholding if you prefer that method instead.

Do I need to make advance payments if I'm retired?

Only if you have income beyond Social Security that isn't being withheld — such as investment income, rental property, or a part-time job. Social Security itself doesn't require estimated payments unless you request voluntary withholding.

What if I can't pay the full amount by the important date?

Pay what you can. The IRS charges interest on unpaid amounts, but there's no additional penalty for a late or partial payment as long as your total payments for the year meet the safe harbor threshold. You can also set up a payment plan for what you owe when you file.

How do I know how much to pay each quarter?

Form 1040-ES includes a worksheet to estimate your annual income and calculate quarterly payments. If your income is irregular, you can pay more in quarters when you earn more and less in slower quarters, as long as your annual total is sufficient.