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Side hustle tax line check

Your side hustle grew. Somewhere between the first sale and this month’s payout you crossed a line the tax office draws: a figure of sales or profit where you tell them, file a return, or expect a form. Type three numbers and see which lines you have crossed, roughly when, and what each one means, with the tax office’s own words beside it.

The check

Runs in your browser; your figures stay with you. Every line comes from the tax office’s own page, shown with its date, and your results come out ready for your adviser.

The lines, and where each one comes from

Every figure below was read on the tax office’s own page on 2026-10-12. The date printed on each page is shown beside it. If a tax office changes a figure, we change it here and the date changes with it.

United States

Tax year: calendar year (1 January to 31 December).

United Kingdom

Tax year: 6 April to 5 April.

Singapore

Tax year: calendar year (1 January to 31 December), taxed in the following Year of Assessment.

Built for the lines

The check is built for one job: your sales, your profit and your number of sales against each country’s lines. Your own tax bill depends on your other income, your deductions and your country’s rates, so take these results and your records to your adviser and the hour is well spent. Trading means buying or making things to sell; clearing out your own old things is a different matter, and the tax office pages above say so.

Records to keep, wherever you are

The free profit tracker keeps all of that, with the fees worked out from each platform’s published rates.

Know the exact sale that took you over

The check above works on totals. The Seller Tax Pack watches your lines as you log each sale, so you see the crossing the day it happens, with the date to put on the form and the figures ready for your adviser. One payment, US$9.99, version 2026.3. Inside:

Built from the tax offices’ own pages, each shown with its date, with your figures ready for your adviser.

When the pack is on sale, this page will carry the link.

Tax line questions

What are the lines based on?

The tax offices’ own pages: the IRS, HMRC and IRAS. Each result shows the page, its date and the sentence the figure comes from, so you can read it yourself. Your own tax bill depends on your other income and deductions, so take these results to your adviser with your records ready.

Which figure do I type as “received”?

Everything buyers paid you this tax year for goods or services, before the platform took its fees: the item prices plus any postage they paid you. Your platform’s payout or sales report has it.

What counts as costs?

Platform fees, the postage you paid, and what the items cost you. The free profit tracker works those out sale by sale; here you type the totals.

Why is the UK line on what I received rather than on profit?

Because HMRC’s trading allowance is £1,000 of gross trading income: the money in, before expenses. In the US and Singapore the first line is on profit (net earnings or net trade income) instead.

A form from the platform never came. What does that mean?

A form, such as the US 1099-K, is a reporting rule between the platform and the tax office. Your profit is taxable either way, so your own records are what count, and this check shows you where you stand.

How exact is “roughly 14 August”?

It assumes you sold at a steady pace from your first sale to today. The Seller Tax Pack’s spreadsheet finds the exact sale that took you over, from your log.

Where do the figures come from, and when were they checked?

The tax offices’ own pages: the IRS, HMRC and IRAS. Each figure on this page carries the page address, the date printed on that page, and the day we read it (2026-10-12). When a tax office changes a figure, we change it here and the date changes with it.

What happens to what I type?

It stays in your browser. The check runs on your device, so your figures go nowhere.