PayoutMath is built and maintained by one person who actually uses the platforms on this site — as a seller, a creator, and someone who files their own Self-Assessment. It's not a SaaS company or an SEO content farm.
I built PayoutMath because every existing UK calculator I tried was either out of date, US-centric, or trying to upsell me on accounting software before showing me a number.
Why the numbers are right
I'm not theorising about these platforms from the outside. I sell on the marketplaces, publish through the creator platforms, and use the payment processors covered here — week in, week out. When a fee structure changes, I usually notice because it hits my own payouts.
That's the whole reason the figures on this site stay current: they're not scraped once and forgotten, they're numbers I have a personal stake in getting right.
What this site is
A growing library of UK earnings calculators. Each one answers a single question: “I earned £X — how much is actually mine after fees and tax?”
Every calculator on the site is:
- Free, no signup, no email wall, no ads. No cookie banner because I don’t set cookies.
- Mobile-first. Most people are checking earnings on a phone.
- Sourced. Every fee and tax band on the site links to the official platform or HMRC page it came from. Each calculator shows when its data was last verified and when it’ll next be reviewed.
- Honest about its limits. Each calc has a “what this doesn’t cover” section. Tax is messy and I’m not your accountant.
What this site isn’t
I am not an accountant, solicitor, or financial advisor. PayoutMath is for information only. If your numbers are big enough that getting tax wrong would be expensive, talk to a professional — and use this site to come prepared.
How I keep it accurate
A few automated guards:
- Locale validator runs at every build. If a UK page accidentally references US currency, US tax authorities, US tax forms or US postal codes, the build fails before it deploys.
- Source URL ping runs monthly. It fetches every fee and tax page I cite, compares the last-modified header to my records, and flags drift.
- Stale-data alert opens an issue if any source data hasn’t been re-verified in 6 months.
Contact
Spot a number that’s wrong, a link that’s broken, or an HMRC rule I’ve explained badly? Email hello@payoutmath.co.uk. I read everything; corrections get fixed and credited in the changelog.