Plain Estimate

Guides

Estimating, invoicing and getting paid, written for people who do the work rather than the paperwork.

How to work out your real hourly rate

Most self-employed trades earn about half their headline rate once unbillable hours and running costs come out. Here is the sum, worked through with real numbers.

1 September 2026 · 8 min read

Why your tools must work with no signal

Basements, plant rooms and lofts have no signal, and that is where the work is. What offline-first actually means, and the four tests to run before you trust it.

31 August 2026 · 5 min read

How to write an estimate that gets accepted

What separates the estimate that gets a yes from the one that gets silence: speed, scope, options, and the four questions every customer has but never asks out loud.

28 August 2026 · 6 min read

Deposits and staged payments on a long job

Why a job longer than a fortnight should be billed in stages, how to split it so the customer agrees, and the rounding mistake that quietly loses money on every split.

24 August 2026 · 6 min read

What actually has to be on an invoice

The parts an invoice needs to get you paid, the parts a tax authority needs, and why the second list will not save you if the first one is missing a reference number.

18 August 2026 · 7 min read

Estimate, quote or invoice: which is which

An estimate is a considered guess, a quote is a promise, and an invoice is a demand for money. Getting the label wrong is how tradespeople end up working for free.

12 August 2026 · 6 min read