Install SkinFlints
Add to your home screen for offline access
Simple money & tax management for the self-employed. Income, expenses, invoices and mileage — sorted, without paying for accounting fluff you'll never use.
Demo login: [email protected] • password: Demo12
No bloated menus, no confusing jargon, no accounting degree required. Just the tools a sole trader actually needs.
Log earnings in seconds with description, date and category. Everything stored and ready for your tax return.
Get paid without the faff. Create branded invoices with your company details and bank info — download or share as PDF instantly.
Set up weekly, monthly or quarterly invoices and SkinFlints generates them automatically. Set it and forget it.
Instantly see which invoices are overdue so you never lose track of money you're owed.
One tap marks an invoice as paid and automatically adds it to your income. No double entry, ever.
Log expenses by category — materials, tools, phone, insurance and more. Everything categorised for your tax return.
Every mile counts. Log business journeys at HMRC approved rates (55p/mile UK) or IRS rates (72.5¢/mile US) — auto-added to expenses.
Your tax bill updates live as you add income and expenses. No surprises at Self Assessment or tax return time.
See what you should be putting aside for tax. SkinFlints tells you exactly how much to set aside each month — never get caught short again.
Step-by-step Self Assessment checklist for UK users. EIN, quarterly payments and Schedule C checklist for US users.
Built-in allowable expenses guide showing exactly what you can claim — HMRC rates for UK, IRS rules for US.
Toggle between monthly and full tax year view. See your profit, expenses and tax estimate for any period.
Export your income, expenses and reports for your accountant or your own records anytime.
Add to your home screen on iPhone or Android for a full app experience — no App Store needed.
Keep working without an internet connection — your data syncs automatically when you're back online.
Your data is encrypted and stored securely using Google Firebase. We never sell or share your information.
Select your country on setup and the entire app switches — terminology, tax calculations, deadlines, mileage rates and more. All correct for your country out of the box.
Everything switches automatically based on your country — currency, terminology, tax rates, deadlines and more.
No training required. No accountant on speed dial. Just sign in and start.
Create your account in seconds. No credit card required for the 30-day trial.
Enter your business name, select UK or USA, and you're on your dashboard.
Add transactions as they happen — or catch up in one go. It takes seconds per entry.
Your dashboard shows your tax bill in real time — no surprises at Self Assessment time.
Enter your income and expenses below for an instant estimate — no signup needed.
Want this to update automatically as you earn?
SkinFlints tracks every transaction and keeps your tax estimate live — all year round.
🇬🇧 UK estimate: Personal Allowance £12,570 · Income Tax 20% basic rate · Class 4 NI 6%
🇺🇸 US estimate: Standard Deduction $16,100 · Federal tax brackets · Self-employment tax 15.3%
Try everything free for 30 days. Then it's £4.99/month for UK, $6.99/month for US. That's it.
No upsells. No hidden fees. No confusing tiers. Just one simple price.
What you see is what you get — one price, everything included, cancel anytime.
30-day free trial — no card required • Cancel anytime • Secure payment via Stripe
If you work for yourself and need to file taxes in the UK or USA, SkinFlints was built for you.
Designers, developers, writers and consultants who invoice clients
Plumbers, electricians, builders and decorators running their own business
Self-employed couriers, taxi drivers and delivery workers tracking mileage and earnings
Sole traders running a shop, market stall or online business
Photographers, videographers, artists and musicians earning self-employed income
IT contractors, project managers and anyone working outside PAYE on a contract basis
After 30 days you'll be prompted to subscribe — £4.99/month for UK users or $6.99/month for US users. No card is needed to start your trial and you won't be charged automatically.
Yes. Your data is encrypted and stored securely using Google Firebase. Only you can access your records — we never sell or share your data with anyone.
Yes — SkinFlints is a PWA (Progressive Web App). Just visit the site on your phone and add it to your home screen. It works like a native app on both iPhone and Android with no App Store needed.
Not at all. SkinFlints is built for people who'd rather keep their cash than study accounting. If you can fill in a spreadsheet, you can use SkinFlints.
Yes — no contracts, no guilt trip, cancel whenever you like.
Yes. You can add income, expenses and invoices without an internet connection. Everything syncs automatically when you're back online.
Primarily yes — it's built and optimised for UK sole traders filing Self Assessment and US sole proprietors filing Schedule C. It also works well for freelancers, contractors and small business owners.
Business money, without the accountant-sized price tag.
🚀 Start Your Free 30-Day TrialNo credit card · Cancel anytime · £4.99/month UK · $6.99/month US
Demo login: [email protected] • password: Demo12