Can I claim broadband?
Home broadband is claimable in its business proportion, and the working-from-home flat rate doesn't swallow it.
Broadband is a normal business running cost, claimed the same way as the phone bill: the business share. If roughly 60% of the use is work, 60% of the bill is the claim, and a connection used only for the business is claimable in full. A typical month's use is a reasonable basis for the split.
The detail people miss: if you claim the £10, £18 or £26 monthly working-from-home flat rate, broadband is not inside it. gov.uk's words: "The flat rate does not include telephone or internet expenses. You can claim the business proportion of these bills by working out the actual costs." Flat rate plus the broadband share is both, legitimately.
Quick answers
I use the working-from-home flat rate. Do I lose broadband?
No. The flat rate covers household running costs like heat, light and power. Phone and internet stay claimable separately, in their business proportion.
I upgraded to full fibre for video calls.
The bill is claimable in its business proportion, whatever the speed. A genuine business-only line is claimable in full.
Every claim, caught automatically
Snap the receipt and SoleTax files it under the right HMRC category, flags what isn't claimable, and keeps the tax number running. 14 days free, no card needed.
Join the betaSources: gov.uk, simplified expenses if you're self-employed (working from home, re-read 8 July 2026) and the SA103F Notes 2026 (Box 23). Checked on 8 July 2026.