Freelancer Tax Deductions in the US and UK: What You Can Actually Claim

Every year, freelancers on both sides of the Atlantic leave real money on the table simply because they are not sure what they are allowed to claim. The rules are different in the US and the UK, and mixing them up is the fastest way to either miss a legitimate deduction or claim something you should not.

What Counts as a Legitimate Business Expense

In both countries, the underlying principle is the same: an expense has to be wholly and directly related to running your business, not your personal life. A laptop you use only for client work qualifies. A laptop you also use to stream shows every evening gets murkier, and both the IRS and HMRC expect you to apportion costs fairly when something serves both purposes.

US Freelancers: Key Deductions Under Schedule C

If you are self-employed in the US, your business income and expenses get reported on Schedule C. Common deductions include a portion of your home internet and phone bill, software subscriptions, business insurance, professional development, and mileage for client-related travel. Self-employment tax itself is partially deductible too, which surprises a lot of first-year freelancers who assume it is a straight cost with no offset. Health insurance premiums are one of the more overlooked deductions here. See our breakdown of health insurance options for US freelancers if you have not sorted out coverage yet, since it directly affects what you can claim.

UK Freelancers: What HMRC Allows You to Claim

UK freelancers operating as sole traders report expenses through Self Assessment. HMRC allows similar categories: office costs, travel, clothing that counts as a uniform or protective gear (not everyday clothes, even if you only wear them for work), staff costs if you employ anyone, and a portion of home costs if you work from home regularly. HMRC also offers simplified flat-rate expenses for some categories, which can save the hassle of tracking every small receipt.

The Home Office Deduction, Handled Differently on Each Side

Both countries let you claim a portion of your home costs if you genuinely work from home, but the calculation methods differ. The US offers a simplified square-footage-based method alongside the more detailed actual-expense method. The UK’s flat-rate system scales with the number of hours worked from home per month. Neither approach rewards guessing, so keeping a simple log of hours or square footage from day one saves a real headache later.

Common Mistakes That Trigger an Audit or Enquiry

The same red flags show up in both countries: claiming 100% business use for something clearly also used personally, round-number expenses with no supporting records, and home office claims that are disproportionate to actual income. Keeping receipts and a simple spreadsheet, updated monthly rather than reconstructed in a panic before the filing deadline, is the single biggest thing that keeps a freelancer out of trouble.

Tax rules change most years in both countries, so treat this as a starting framework rather than filing advice, and check current thresholds with a qualified accountant or tax adviser before you submit anything.