Jobs that grow once you open the wall
When a job turns out bigger than quoted, capture a signed variation on the spot so the extra work is agreed in writing.
The job management app for plumbers
From emergency callouts to full bathroom installs — schedule jobs, quote on site, capture signed approvals, and get paid faster.
Free to start · No card · No download needed — works in your browser
Sound familiar?
The admin headaches every plumber knows — solved.
Juggling callouts and booked-in work
The job diary keeps emergency callouts, quotes to follow up, and booked installs in one view you can rearrange in seconds.
Invoices written up days later
Invoice at the kitchen table before you leave, with parts and labour itemised and a card payment link included.
Built around a plumber’s working day
Quotes & estimates on site
Price up bathroom refits, boiler swaps, and repairs from your phone, and send quotes customers can sign digitally.
Signed variations
Scope changed mid-job? Get the extra work acknowledged and signed before you do it — no awkward invoice disputes.
Expense & materials tracking
Snap receipts from the merchant and log them against the job, so your margins are never a mystery.
Offline-first for basements and voids
No signal under the floorboards? Everything works offline and syncs later.
Need the full tour? See everything the TradePlanr app does including digital signatures and job sign-offs.
Not the one on the tools? There’s a version of this page for whoever runs the office.
Got engineers on the books? TradePlanr for plumbing companies.
Free calculators every plumber can use
No sign-up, no subscription — the same trade calculators built into the TradePlanr app, free on the web.
Radiator / Room Sizing
Approximate heat requirement for a room from its size and use.
Expansion Vessel Sizing
Minimum vessel size for a sealed heating system.
System Volume Estimate
Approximate water content of a heating system.
Cylinder Reheat Time
Time and energy to heat a hot water cylinder.
Flow Rate from kW & ΔT
Required circulation flow for a heat load at a design ΔT.
Radiator ΔT Output Correction
Convert a radiator’s catalogue output to the output at your system’s ΔT.
Underfloor Heating Pipe Length
Estimate UFH pipe length and loop count from floor area and pipe spacing.
Boiler / Heat Pump Sizing
Estimate whole-house heat loss and the boiler or heat pump size to match.
Heat Pump vs Gas Running Cost
Compare the annual running cost of a heat pump against a gas boiler.
Running Cost
What an appliance costs to run at a given tariff.
Unit Converter
Common trade unit conversions.
Markup & VAT
Sell price from cost, markup and VAT.
Job Price / Quote Builder
Build a quote from materials, labour and margin.
Day Rate ↔ Hourly Rate
Convert between hourly, day, week and year.
CIS Tax Deduction
CIS deducted and net pay on a subcontractor invoice.
VAT Flat Rate vs Standard
Compare VAT owed on the flat rate and standard schemes.
Self-Employed Tax & NI
Estimate Income Tax, Class 4 NI and take-home from your annual profit.
VAT Registration Threshold
How close your rolling turnover is to the £90,000 VAT registration threshold.
What Should I Charge?
Work back from the income you want to the day and hourly rate you need to charge.
Late Payment Interest
Statutory interest and compensation you can claim on an overdue commercial invoice.
Deposit & Staged Payments
Split a job into a deposit and staged payments.
Retention (Commercial)
Retention held on a contract and when each half is released.
Mileage / Fuel per Job
Mileage claim or actual fuel cost for a journey.
Real Hourly Rate
Your true hourly rate once travel, quoting and admin time are counted.
“TradePlanr has completely transformed how I run my plumbing business. Invoicing used to take hours, now it takes minutes.”
Mike Thompson
Plumber, London
Join plumbers across the UK using TradePlanr
Start free in your browser and set up your first job in minutes — no download needed.