You pay both halves of the payroll tax, four times a year, on money nobody withheld. The habit that prevents the disaster takes one afternoon to set up.
Nothing is withheld, and that is the whole problem
An employee's tax is taken from every paycheck automatically. A freelancer receives the full amount and owes tax on it later — which feels like earning more right up until the bill arrives.
People who have only ever been employees frequently spend money that was never theirs. The fix is mechanical: treat a percentage of every payment as not yours the moment it lands.
Self-employment tax is the part that surprises people
Beyond income tax, self-employed people owe self-employment tax — Social Security and Medicare. As an employee you pay half and your employer pays half. Working for yourself, you pay both halves.
That is the single biggest shock for new freelancers, and it applies from a very low threshold of net earnings. One partial consolation: you can deduct the employer-equivalent half when calculating your income tax.
Quarterly estimated payments
The US tax system is pay-as-you-go. If you expect to owe above a modest threshold, you are generally required to make estimated payments four times a year rather than settling up in April.
Skip them and you can owe an underpayment penalty even if you pay the full amount on time in the spring. The deadlines fall in April, June, September and the following January — note that they are not evenly spaced quarters, which catches people every year.
A common safe-harbour approach is to pay at least what you owed last year, spread across the four dates. Check the current rules at irs.gov, since thresholds and percentages change.
Open a second checking account and move a fixed percentage of every single payment into it the day it arrives — many freelancers use somewhere around 25–30% as a starting point, adjusted once they know their actual rate. Pay estimated taxes from that account and never from operating cash. This one habit prevents the most common freelance disaster.
Deductions are the compensation
Self-employment costs more in tax and gives you deductions an employee cannot take. Ordinary and necessary business expenses reduce your net profit, which is what you are taxed on.
- Equipment, software and subscriptions used for work.
- A home office, if the space is used regularly and exclusively for business. The exclusivity requirement is real and audited.
- Business mileage, or actual vehicle costs — one method or the other, tracked contemporaneously.
- Health insurance premiums, for many self-employed people.
- Professional services, education relevant to your work, business travel.
- Retirement contributions through a solo 401(k) or SEP IRA, whose limits can be far higher than an employee's.
Keep records as you go. Reconstructing a year of expenses in April is how deductions get missed and how audits get uncomfortable.
Forms you will meet
Clients paying above a threshold send a 1099-NEC. Payment platforms may send a 1099-K. Neither is the definition of your income — you owe tax on everything you earned, including cash and amounts too small to trigger a form. The IRS receives copies of the forms, so mismatches get noticed.
Your profit is reported on Schedule C, and self-employment tax on Schedule SE.
Price for it
A freelance rate has to cover what an employer used to absorb: both halves of payroll tax, health insurance, retirement, paid time off, sick days and the unpaid hours spent on admin and finding work.
This is why converting a salary directly into an hourly rate understates what you need to charge, often badly. Our salary calculator has fields for unbilled hours and business costs precisely for this.
This is educational content, not tax advice. Once self-employment income becomes meaningful, an accountant generally saves more than the fee — particularly on entity choice and retirement structure.