COGS CALCULATOR
COGS UK Seller Fee Calculator
Work out exactly what the goods you sold cost you, and what that leaves you as gross profit, with a free calculator and a downloadable Excel workbook.
Cost of Goods Sold (COGS) Calculator
COGS is what it cost you to buy or make the goods you actually sold in a period. The formula: opening inventory plus purchases and direct costs, minus closing inventory. Type your figures and the result updates as you go.
–
Fill in the three inventory figures to see your COGS.
Gross profit – Gross margin –
Closing inventory is larger than opening inventory plus purchases, which makes COGS negative. Worth checking the figures: the commonest causes are a stock count valued at selling price instead of cost, or purchases missing from the period.
Take this calculator into Excel
The workbook version goes further than the widget: it splits purchases into stock, carriage inwards and direct labour, and adds a 12-month tracker that carries each month's closing inventory forward and watches your gross margin across the year.
Download the Excel workbook Not sure what belongs in your COGS? Get in touchFAQs
Can’t find the answer you’re looking for? Please chat to our friendly team.
We provide bookkeeping, VAT returns, payroll, tax filings, annual accounts, and advisory services — tailored to freelancers, SMEs, and ecommerce businesses.
Yes. Every client works with a named accountant who knows your business inside out. You’ll never deal with call centres — just direct, personal support.
We’re certified partners with Xero and QuickBooks. Our digital-first approach means you’ll always have real-time access to your financial data.
We offer fixed monthly packages with no hidden fees. Pricing depends on your business size and the level of support you need — but you’ll always know exactly what you’re paying for.
Absolutely. We handle VAT, corporation tax, self-assessments, and payroll tax. We also manage HMRC correspondence on your behalf to ensure you never miss a deadline.
No. While many of our clients are London-based, we also support businesses across the UK and ecommerce sellers worldwide through our cloud-based systems.
RESOURCES
Fresh takes on business and accounting.
Company law allows accounts to run for 18 months; corporation tax never allows an accounting period longer than 12. Here is how the split is drawn.
The associated companies rules get more involved once a group has layers. Sub-subsidiaries, dormant holding companies and short accounting periods, worked through in a single example.
An acquisition partway through the year still counts as an associated company for the whole accounting period. What that does to your thresholds, and to your tax bill.
CONTACT
Get in touch

