GraftG tools

Free calculators for UK tradespeople — plus WhatsApp-powered admin tools.

Free calculators

No sign-up. No cost. Use them as many times as you like.

🧮 FREE TOOL
CIS deduction calculator — 20% and 30% rates
Calculate CIS deductions on labour for UK construction subcontractors. 20% registered, 30% unregistered, 0% gr…
 🧮 FREE TOOL
HMRC mileage calculator — 55p and 25p AMAP rates 2026/27
Free HMRC mileage calculator for 2026/27: 55p a mile for the first 10,000 business miles, then 25p. Worked exa…
 🧮 FREE TOOL
VAT calculator — add or remove 20% VAT instantly
Add 20% VAT, remove VAT from a gross amount, or reverse-calculate the VAT element. Free UK VAT calculator for …
 🧮 FREE TOOL
Income tax calculator for UK self-employed
Calculate your income tax as a self-employed tradesperson. Personal allowance, 20%/40%/45% bands, plus Class 4…
 🧮 FREE TOOL
National Insurance calculator for self-employed
Calculate Class 4 National Insurance on your self-employed profits. 6% between £12,570–£50,270, 2% above. Free…
 🧮 FREE TOOL
Capital gains tax calculator UK 2026/27
Calculate UK capital gains tax on property, shares, or business assets. Annual exempt amount £3,000, rates 18%…
 🧮 FREE TOOL
Dividend tax calculator UK 2026/27
Calculate dividend tax for UK company directors. £500 allowance, then 8.75%/33.75%/39.35%. Free dividend tax c…
 🧮 FREE TOOL
Late payment interest calculator UK
Work out statutory interest and compensation on an overdue B2B invoice: 8% plus the Bank of England base rate …
 🧮 FREE TOOL
Late payment letter templates — 3 free chasing letters
Three free UK late payment letters: a polite reminder, a firm reminder and a final notice claiming statutory i…
 🧮 FREE TOOL
Profit margin calculator — markup vs margin
Calculate profit margin and markup on trade jobs. Enter cost and selling price to see your margin percentage, …
 🧮 FREE TOOL
Hourly rate calculator — daily and annual conversions
Convert between hourly, daily, and annual rates. Set your hours per day and working days per year. Free calcul…
 🧮 FREE TOOL
CIS subcontractor calculator — multiple subbies on one job
Calculate CIS deductions for up to 6 subcontractors on one job. Mixed rates (20%, 30%, gross). See total deduc…
 🧮 FREE TOOL
Free WhatsApp invoice generator
Free UK invoice maker: fill in the job, download a proper PDF invoice with your bank details, and send it on W…

WhatsApp tools & guides

Features that come with your GraftG plan — from £14/month, 14-day free trial.

The WhatsApp mileage tracker for UK tradespeople
Text your miles, get HMRC totals. UK's simplest mileage logger — works on WhatsApp, calculates the 55p / 25p H…
WhatsApp receipt scanner — UK MTD ready
Snap a receipt on WhatsApp. GraftG extracts merchant, total, VAT and category — ready for Making Tax Digital. …
WhatsApp quote builder for UK tradespeople
Describe the job on WhatsApp or in a voice note and get a branded PDF quote back, with VAT. Reply ACCEPT when …
HMRC mileage app for UK self-employed
The UK's simplest HMRC mileage app — uses official 55p/25p AMAP rates, exports to CSV for self-assessment, sen…
CIS invoice app for UK contractors & subcontractors
Handle CIS on WhatsApp: deductions shown on your invoices as a subcontractor, payment & deduction statemen…
Voice-note invoicing on WhatsApp
Send a WhatsApp voice note — "quote for Dave, two days labour, £480 parts" — and get a branded PDF q…
Automatic late payment chasing for UK tradies
GraftG chases overdue invoices for you: friendly at 1 day, polite at 7, firm at 14, final reminder at 21 (inte…
Free invoice template for UK tradespeople
Free UK invoice templates to download in PDF, Word and Excel — standard, VAT and CIS versions, each with a lab…
VAT invoice template for UK tradespeople
What goes on a UK VAT invoice? Requirements, layout, and a free guide for tradespeople. Or skip the template —…
Self-assessment expenses guide for UK tradespeople
What expenses can UK tradespeople claim on self-assessment? Mileage, tools, materials, insurance, phone — the …
Construction Industry Scheme (CIS) — the complete guide
CIS deductions explained for UK subcontractors and contractors: 20%, 30% and gross rates, labour-only rule, a …
WhatsApp invoice app for UK tradespeople
Text the job to GraftG on WhatsApp and get a numbered PDF invoice back, with your bank details, VAT and an opt…