Freelancer Tax Basics: What to Track and When to Pay
A plain-English walkthrough of what freelancers and solo contractors need to track, when to file, and how to avoid the surprises that catch first-timers at year end.
Freelancer taxes are simpler than they look and worse than you remember. The mechanics — track income, track expenses, file on time — are straightforward. The pain comes from the things nobody tells you: you pay both halves of payroll tax in the US, you may need to pay quarterly, and 'owing tax' is a sign of doing well, not failing. This guide covers the essentials that apply across most countries, with notes for US, UK, and Australian freelancers.
The golden rule: track as you go
Reconstructing a year of income and expenses in April is how freelancers overpay their accountants and miss deductions. Set up two habits now: a separate business bank account so income and spending are easy to filter, and a simple spreadsheet (or app) where every transaction gets a category and a receipt. Ten minutes a week saves a weekend a year.
What counts as a deductible expense
A deductible expense is money you spent wholly and exclusively to earn your freelance income. The categories most freelancers forget are the small recurring ones — software subscriptions, cloud storage, the portion of your phone bill used for work, and home office costs. Keep receipts even for tiny amounts; they add up.
- Software, SaaS subscriptions, and online tools used for work
- Hardware and equipment (laptop, camera, monitor) — often depreciated over several years
- Home office: a percentage of rent, utilities, and internet based on workspace area
- Travel to client sites, conferences, and project locations
- Professional development: courses, books, and subscriptions in your field
- Bank fees and payment processing fees on client payments
- Accounting and legal fees related to your business
Quarterly payments: the trap that catches everyone
In the US, freelancers are expected to pay estimated taxes four times a year (April, June, September, January), not just at the April filing deadline. Skip them and you will owe the year-end balance plus an underpayment penalty. The safe-harbour rule: if you pay at least 100% of last year's tax (110% if your income is over $150,000), you avoid the penalty even if you underpay this year.
The UK and Australia work differently — income tax is settled annually through Self Assessment (UK) or the ATO (Australia), but you should still set money aside as you earn. A common rule of thumb is to move 25–30% of every invoice into a separate 'tax pot' so the money is there when the bill arrives.
Tip: the moment a client payment lands, move your tax percentage into a separate savings account. If you wait until the bill arrives, the money will have been spent on something else — every freelancer learns this the hard way.
Self-employment tax in the US, explained
US freelancers pay self-employment tax of 15.3% on top of income tax. That is the combined employer and employee halves of Social Security and Medicare — when you were an employee, your employer quietly covered half. You can deduct half of this (7.65%) from your adjusted gross income, which softens the blow slightly.
When you need to register for VAT, GST, or sales tax
If you are in the UK, you must register for VAT once your taxable turnover exceeds £90,000 (2024/25 threshold). Australia requires GST registration above AUD $75,000. The EU and Canada have similar thresholds — see our VAT, GST, and Sales Tax guide for the full list. Registering means you charge tax on invoices and can reclaim it on expenses, but it also means quarterly or monthly filing.
Keeping records: how long is long enough?
Most tax authorities want you to keep records for several years after filing. The IRS asks for three years generally (six if you underreported income by more than 25%, indefinitely if fraud is involved). HMRC wants six years. The ATO wants five. Keep digital copies — scanned receipts and PDF bank statements are perfectly acceptable — and back them up.
Filing: don't miss the deadline
US freelancers file Schedule C with their 1040 by 15 April (with estimated payments due quarterly). UK Self Assessment is due 31 January after the tax year ends (with payments on account in January and July). Australian tax returns are due 31 October if you self-lodge. Miss a deadline and you will get an automatic fine — and the deadlines move very little, so set a calendar reminder for the whole year in January.
Tip: file early even if you cannot pay. Most penalties are based on late filing, not late payment, and many tax offices offer payment plans if you owe more than you can pay at once. Silence is what gets expensive.
Put it into practice
Create a polished document right now — free, private, no signup.