Skip to main content

    The 2025-26 financial year has ended — the EOFY checklist still helps with July lodging and your June BAS. EOFY checklist →

    37 free tools. One question each. Answered in under a minute.

    Checkers, calculators, builders and decoders for tradespeople. No signup. No paywall. Open the one you need, get an answer, get on with your day.

    Every tool here is built around a single question a tradesperson actually asks — 'is my pay legal?', 'does this need regs?', `what does this $ATO letter mean?`. They all cite the rule or law they're based on. None of them need you to create an account.

    Builders

    Create professional documents in minutes. No design skills needed. No agency fees.

    Calculators

    Plug in your numbers. Get a clear answer. Every calculator is based on actual legislation, not guesswork.

    Calculator

    Tax Set-Aside Calculator

    How much of every job to put aside for income tax, the Medicare levy and your HELP debt.

    Calculator

    GST Calculator

    Add 10% GST to a price, or pull the GST out of a GST-inclusive total.

    Calculator

    BAS Estimator

    Roughly what you'll owe (or get back) this quarter — net GST plus PAYG.

    Calculator

    Super Guarantee Calculator

    The 12% super you owe on an employee's ordinary time earnings, with the quarterly cap.

    Calculator

    Instant Asset Write-Off Checker

    Can you write this tool or vehicle off in full this year, or do you depreciate it?

    Calculator

    Monthly Profit Tracker

    Track your real monthly profit and your running ATO tax bill across the financial year.

    Calculator

    What Should I Actually Charge?

    The day rate you genuinely need to take home what you want, after tax, super and costs.

    Calculator

    Car Expense (Cents Per Km) Calculator

    Your ATO cents-per-kilometre claim — and when a logbook beats it.

    Calculator

    Late Payment Calculator

    Work out the interest on an overdue invoice, and the faster Security of Payment route to get paid.

    Calculator

    Security of Payment Deadlines

    Your SoP dates by state — when the respondent must reply, and when payment falls due.

    Calculator

    Retention Calculator

    Track the retention held on a job, and when each half is due back.

    Calculator

    Warranty & Defects Calculator

    Snagging window, your workmanship guarantee, and the statutory warranty period for your state.

    Calculator

    Annual Leave & Loading Calculator

    The leave you're owed — NES annual leave, 17.5% loading, or the casual loading instead.

    Calculator

    Notice Period Calculator

    The NES minimum notice your employer must give, by your length of service.

    Calculator

    PPE Budget Estimator

    Build a PPE list by trade and task, with the annual cost — and who must pay for it.

    Checkers

    Answer a few questions. Find out where you stand. Every checker is built on the actual regulations — not opinions.

    Built for your phone, not a desktop

    Every tool works on mobile. Use them on site, in the van, at the merchant — wherever you need the answer. No app to download. No account to create. Just open the link and use it.

    No data collected

    We don't store your inputs, track your usage, or sell your information. The calculations happen in your browser and stay there. When you close the tab, it's gone.

    Missing a tool you'd find useful?

    Email us at hello@kilnguides.co.uk with what you need. If enough people ask, we'll build it.

    Want to sponsor a tool? Your brand alongside a tool tradespeople actually use — not an ad they scroll past. Learn about sponsorship →