January 15, 2025
Quarterly Estimated Taxes: A Freelancer's Guide to Paying the IRS Four Times a Year
If you file with a W-9, no one withholds taxes from your pay. Here's how quarterly estimated taxes work, when they're due, and how to avoid a penalty.
- If you expect to owe $1,000 or more for the year, the IRS generally expects quarterly payments, not one lump sum in April.
- There are four due dates a year, and they don't line up evenly with calendar quarters.
- You can calculate your payments from last year's tax bill or from this year's estimated income.
- Missing a due date usually means a small penalty, not a legal problem, but it adds up if you skip it repeatedly.
When you fill out a W-9 instead of a W-4, nobody is withholding taxes from what you get paid. That’s convenient in the moment and a problem in April if you haven’t planned for it. Quarterly estimated taxes are how the IRS expects self-employed people, freelancers, and contractors to stay current throughout the year instead of owing everything at once.
Why estimated taxes exist
The U.S. tax system is pay-as-you-go. Employees have this handled automatically: their employer withholds income tax and their share of Social Security and Medicare from every paycheck. When you’re paid as a 1099 contractor, that withholding never happens, so the IRS asks you to send in payments yourself, four times a year, as you earn the income.
Skip this and file everything at tax time instead, and you can end up with both a large bill and an underpayment penalty on top of it.
Who actually needs to pay them
As a general rule, you should make quarterly payments if you expect to owe $1,000 or more in tax for the year after subtracting any withholding you do have (say, from a part-time W-2 job). Most full-time freelancers and contractors clear this threshold easily.
If your only income is from a W-9 job and you’re not having any tax withheld anywhere else, assume you need to be paying quarterly unless your net income is very small.
The four due dates
The payment periods don’t map cleanly to calendar quarters, which trips people up. For a typical calendar-year filer, the due dates are:
| Payment period | Due date |
|---|---|
| January 1 to March 31 | April 15 |
| April 1 to May 31 | June 15 |
| June 1 to August 31 | September 15 |
| September 1 to December 31 | January 15 (following year) |
If a due date falls on a weekend or federal holiday, it shifts to the next business day.
How to figure out what to pay
There are two common approaches:
The safe harbor method. Pay in 100% of what you owed last year (110% if your adjusted gross income was over $150,000), split into four equal payments. If you match this, the IRS generally won’t charge an underpayment penalty even if you end up owing more when you file, because your income grew.
The current-year estimate method. Add up your expected self-employment income, subtract deductible business expenses, and estimate the income tax and self-employment tax you’ll owe on the total. Divide by four. This is more accurate if your income is growing or shrinking, but it takes more work to keep updated.
Our self-employment tax calculator can help you get a quick estimate of what a quarterly payment might look like based on your expected income for the year.
What counts toward the payment
A quarterly estimated tax payment covers two things:
- Federal income tax on your net earnings, at your regular bracket.
- Self-employment tax, which covers the Social Security and Medicare contributions an employer would normally split with you. As a contractor, you pay both halves yourself, currently 15.3% on most self-employment income.
Many states also require their own quarterly estimated payments if you owe state income tax, on a separate schedule from the federal one. Check your state’s department of revenue for its specific rules.
How to actually send the payment
The most common method is IRS Direct Pay, which lets you pay directly from a bank account for free at irs.gov. You can also mail a check with Form 1040-ES, use the Electronic Federal Tax Payment System (EFTPS), or pay by card through an IRS-approved processor (usually with a small fee).
Keep the confirmation number or a copy of the mailed voucher. You’ll want it if there’s ever a question about whether a payment was received.
What happens if you miss one or underpay
Missing a quarterly deadline or paying too little usually results in an underpayment penalty, calculated based on how much you were short and for how long. It’s an interest-based charge, not a criminal matter, and it’s often smaller than people expect for a single missed quarter. That said, it compounds if it becomes a habit, and it’s simple to avoid by setting aside a percentage of every payment you receive as it comes in.
A common approach: move 25 to 30% of every 1099 payment into a separate savings account the day it lands, so the money is already there when a due date arrives.
Ready to get organized?
If you haven’t given a client your taxpayer information yet, you’ll need a W-9 on file before they can pay you. Fill out your W-9 now using W9 Helper, free and in your browser.
This article is general information, not tax advice. Talk with a tax professional about your specific situation, especially if your income varies significantly throughout the year.