Shopify resource library
Every free calculator, workbook, checklist and guide we have built for UK Shopify sellers. All of it free, none of it behind an email form, all of it on 2026/27 rates. Most of it works just as well if you sell somewhere else too.
Format
Topic
38 resources, all free, no signup
Calculators
Work the number out on the page, then take the Excel version away.
Landed Cost CalculatorTrue cost per unit once freight, duty, clearance and handling are in. A supplier invoice alone usually understates it by a third.Calculator plus Excel
COGS CalculatorWhat the goods you actually sold cost you, from opening stock, purchases and closing stock.Calculator plus Excel
Profit Margin CalculatorGross and net margin, with the markup conversion that stops the two being confused.Calculator plus Excel
Break-Even Point CalculatorThe sales level at which contribution finally covers your fixed costs, in units and in revenue.Calculator plus Excel
Break-Even ROAS CalculatorThe ad return at which advertising pays for itself. Judge a reported 3.1x against this rather than against a round number.Calculator plus Excel
Shopify Fee CalculatorWhat Shopify and the payment processor take out of each order, and what is left.Calculator
Amazon Profit CalculatorReferral fees, fulfilment and storage taken off a selling price to leave what you keep.Calculator
Sensitivity Analysis CalculatorWhat a price or cost change does to profit, so you can see which lever is worth pulling.Calculator
VAT CalculatorAdd VAT or take it out of a gross figure, at any rate.Calculator plus Excel
VAT Threshold TrackerRolling twelve-month turnover against the £90,000 threshold, with your notification and registration dates.Calculator plus Excel
Corporation Tax Calculator19 and 25 per cent with marginal relief handled, including the 26.5 per cent band people do not expect.Calculator plus Excel
Dividend Tax CalculatorThe 2026/27 rates with the £500 allowance and the personal allowance taper both applied.Calculator plus Excel
Payslip CalculatorTake-home pay after income tax, National Insurance, pension and student loan.Calculator plus Excel
Seller Take-Home CalculatorStore profit followed all the way to your pocket, through employer NI, corporation tax and dividend tax.Calculator plus Excel
Employee Cost CalculatorWhat a hire really costs once employer NI and pension are added to the salary.Calculator plus Excel
Working Capital CalculatorWorking capital with the current and quick ratios, which is the harder test for anyone holding stock.Calculator plus Excel
Cash Burn CalculatorHow long the money lasts at the rate you are spending it.Calculator
Equity and Investment CalculatorWhat a lump sum and monthly contributions could grow into after charges.Calculator plus Excel
Workbooks and templates
Excel files that keep working after you close the tab.
Payout Reconciliation WorkbookBridges store sales to the money in the bank through fees, refunds, chargebacks and reserves, and gives you the journal.Excel workbook
Shopify Bookkeeping TemplateA year of bookkeeping on four sheets, with a summary and the quarterly figures already worked out.Excel template
SKU Margin TrackerContribution per product after landed cost, fees and advertising, ranked so the losing lines surface.Excel workbook
13-Week Cash Flow ForecastPayout lags, lumpy stock orders and the VAT quarter, showing the week your cash gets tight before it does.Excel workbook
Refunds and Returns TrackerWhat a return actually costs by product, and the return rate at which a line stops being worth selling.Excel workbook
Inventory Count WorkbookCounts and values stock at the lower of cost and net realisable value, then bridges it into cost of sales.Excel workbook
Director's Loan Account TrackerThe section 455 charge at both 2026 rates, the benefit in kind above £10,000, and the nine-month clock.Excel workbook
Mileage and Home Office LogBusiness mileage at the new 55p rate and the home office claim three ways. The two things almost everyone under-claims.Excel workbook
Tax Calendar WorkbookEnter your year end and get every filing and payment date for the year, with days to go and the penalty for missing each.Excel workbook
Checklists
Printable, timed, and ordered so nothing depends on something later.
Monthly Close ChecklistNinety minutes a month, in the only order that works: payouts reconciled before margins are judged.Printable, 90 minutes
Year-End ChecklistStock count, cut-off and the forgotten liabilities. A third of it has to happen before the date rather than after it.Printable, 3 hours
HMRC Records ChecklistWhat to keep, in what form, and for how long. An audit of what you already have rather than a list of things to do.Printable, 20 minutes
New Store Setup ChecklistThirty-five things that take minutes now and hours to sort out retrospectively.Printable, 2 hours
VAT Registration ReadinessThe checks, decisions and paperwork before you register, including the pre-registration VAT most people miss.Printable checklist
Am I Ready to Go Limited?The signals that make incorporating worth it, the reasons that no longer count, and the arithmetic behind both.Printable checklist
Guides and e-books
The longer reads, with worked examples on current rates.
The UK Tax HandbookSixteen chapters on UK tax for online sellers, from whether you are trading at all to the mistakes that cost the most.E-book
Pricing for ProfitLanded cost, margin, contribution and break-even ROAS, and what VAT registration does to a price list.E-book
Sole Trader or Limited?The comparison on 2026/27 rates at three profit levels, including the levels where a sole trader still keeps more.E-book
From First Sale to First VAT ReturnOne shop followed through eighteen months and every tax event on the way, ending at £90,000.E-book
Glossary
Every term, defined, with the tool that deals with it.
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Not sure which one you need? Tell us what you are trying to work out and we will point you at the right one, or build it if it does not exist yet.