Most employees never think about estimated taxes because their employer handles withholding automatically — a portion of every paycheck goes straight to the tax authority before the employee sees it. When you're a freelancer, that automatic system disappears. You receive your full payment from clients, and the responsibility for setting aside and remitting taxes falls entirely on you.
The result, if you're not prepared for it: a large tax bill at year-end, possible underpayment penalties, and the unpleasant discovery that money you've already spent was actually owed to the government. The good news is that the system is manageable once you understand how it works.
Important note: Tax rules vary significantly by country, income level, filing status, and business structure. This guide covers the general principles with US-specific examples. Always confirm your specific obligations with a qualified tax professional for your jurisdiction.
What Are Estimated Taxes?
Estimated taxes are periodic tax payments made by self-employed individuals and businesses throughout the year, rather than in a single lump sum at filing time. In the US, the IRS requires estimated tax payments if you expect to owe at least $1,000 in federal taxes for the year and your withholding won't cover at least 90% of this year's tax liability (or 100% of last year's).
Most US states with income taxes have similar requirements. Other countries have analogous systems — the UK has Payment on Account, Australia has PAYG instalments, Canada has instalment payments for self-employed individuals. The mechanics differ, but the underlying principle is the same: pay as you earn, not all at the end.
When Are US Estimated Tax Payments Due?
In the US, the IRS sets four estimated tax payment deadlines annually, which do not align neatly with calendar quarters. These dates shift slightly when they fall on weekends or holidays, so verify current-year due dates at IRS.gov. The approximate schedule is:
- Mid-April: covering January 1 – March 31
- Mid-June: covering April 1 – May 31
- Mid-September: covering June 1 – August 31
- Mid-January (following year): covering September 1 – December 31
Missing a deadline doesn't mean you've missed all deadlines — you can still make a payment for the period, though you may owe a penalty for being late on that installment.
How to Calculate What You Owe
There are two common methods for calculating US estimated tax payments:
Method 1: The Safe Harbor Approach (Simpler)
Pay at least 100% of your previous year's total tax liability (110% if your prior-year adjusted gross income was over $150,000), divided into four equal payments. If you do this, you won't owe an underpayment penalty — even if you end up owing more at filing time.
This works well if your income this year is similar to last year. It's less useful if you're in your first year of freelancing (no prior-year liability to base it on) or if your income has significantly increased.
Method 2: Estimate Your Current-Year Tax
Project your total income for the year, subtract deductible business expenses, calculate the resulting tax liability (including self-employment tax), and divide by four. Recalculate each quarter as your actual income becomes clearer.
Self-employment tax (15.3% on net self-employment income up to a threshold, then lower above it) is the part most first-year freelancers miss. When you're an employee, your employer pays half of this — as a freelancer, you pay both halves. However, you can deduct half of self-employment tax on your income tax return, which softens the impact.
The Simple Setting-Aside Habit
The easiest system: each time you receive a payment from a client, immediately transfer a set percentage to a dedicated tax savings account. You don't touch that account for anything other than tax payments.
The right percentage varies. We cover this in detail in our guide on how much freelancers should save for taxes. As a rough starting point for US freelancers: 25–30% of gross income is a common recommendation, but your actual rate depends on your total income, deductions, filing status, and state. A tax professional can help you calibrate this for your specific situation.
How to Actually Make the Payments
In the US, IRS Direct Pay (at IRS.gov) allows free electronic payments from a bank account. You can also pay by mail with IRS Form 1040-ES, through the Electronic Federal Tax Payment System (EFTPS), or via certain mobile payment services. For state taxes, your state's revenue department will have an online payment portal.
What Happens If You Miss a Payment
Missing or underpaying an estimated tax installment results in an underpayment penalty — calculated as interest on the amount underpaid for the period it was underpaid. The penalty rate changes quarterly based on federal interest rates. It's usually not catastrophic, but it's an unnecessary cost. The safe harbor method (paying 100%+ of last year's liability) is the simplest way to avoid it entirely.
Deductions Reduce What You Owe
One reason to track business expenses carefully throughout the year: deductible expenses reduce your taxable net income, which directly reduces your estimated tax liability. Home office, equipment, software, professional services, education, and many other business costs may be deductible. We cover these in our freelancer tax deductions checklist.
The Bottom Line
Estimated taxes are manageable with two habits: a consistent setting-aside routine throughout the year, and paying each quarterly installment on time. The first year is the hardest because there's no prior-year baseline to work from. After that, the system becomes routine. For the full picture of freelance finance, see our hub guide: The Complete Guide to Freelance Business Finance.
Want the first report without wrestling a spreadsheet?
Upload one bank statement. Compass categorises the transactions, flags invoice gaps, and gives you an owner-readable report in about ten minutes.
Start free trial