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Side hustle to business, edited in Livingston 65 Aller Pl, Livingston EH54 6RG, UK

Issue 14 · October 2026 · Livingston

The week a side hustle starts acting like a business

The first paid job is a thrill. The second one, booked over a kitchen table while your day job is still on the laptop, is the start of a different problem: who is the customer, what does the work cost, and which part of HMRC expects to hear from you. Ontarictensor is the UK desk that writes that crossing down.

Read the setup guide Field notes

General reading for people in the UK. Not tax, legal, or accountancy advice. Figures below were checked on 28 October 2026.

A woman working on a side hustle at a kitchen table in a British home at dusk

Allowance

£1,000

Trading allowance

Gross trading income up to £1,000 in a tax year can sit inside the trading allowance. Cross it, and Self Assessment usually enters the conversation. You cannot claim the allowance and also deduct the same expenses.

Turnover, not profit

£90,000

VAT registration line

The VAT threshold looks at taxable turnover across any rolling 12 months, or a next-30-days expectation. A busy quarter of markets can arrive before the profit does. Keep a running total.

Already in force

Apr 2026

Making Tax Digital

MTD for Income Tax started on 6 April 2026 where qualifying income was over £50,000. The line drops to £30,000 in April 2027 and is planned at £20,000 in April 2028. A company is a different reporting world, not a shortcut.

On the desk this month

Four notes for the crossing

A spare room in a Scottish house set up as a small two-person studio

Guide · 21 October 2026

Sole trader, limited company, and the week you file

Registration deadlines, Scottish income tax, what a company actually adds to the admin pile, and why “I’ll incorporate to avoid Making Tax Digital” is the wrong sentence to start with.
Two people meeting over coffee in a Scottish cafe

Clients

From favours to invoices

Deposits, scope, and late commercial debts.

 A home office desk with a calculator, mug, and closed laptop

Money

Pricing the leap

A worked illustration that includes the boring costs.

 A weekend market stall of ceramics and linen in a UK town square

Stories

Three field notes

A stall, a workshop, a spare room. Composites, clearly labelled.
Three people planning a small business around a kitchen island in the evening

A sequence, not a mood

What “becoming a business” usually means in practice

  1. 1

    Separate the money. A second bank account, even as a sole trader, stops the Saturday market cash dissolving into the weekly shop.

  2. 2

    Write the job down. A one-page scope and a deposit beat a long chat and a late “can you just”.

  3. 3

    Price the whole job. Materials, platform fees, packaging, mileage, and the hours you pretend are free.

  4. 4

    Tell the right office. HMRC for the tax status you actually have. Companies House only if you have chosen a company. The ICO if you are holding other people’s data and no exemption fits.

  5. 5

    Buy the dull insurance. Public liability, product liability if you sell goods, professional indemnity if you sell judgement. Employers’ liability if you take someone on.

“The side hustle ended the week I started paying myself after the costs, not before them.”

From the field notes · a spare-room studio in West Lothian

If you only read one page

Start with the structure you have, not the one you admire

Most people on this desk do not need a limited company in month two. They need a record of income, a price that survives materials, and a sentence they can say when a friend asks for a discount.

Open the pricing note

Send the desk a correction

Thresholds move. If a figure on this site has gone stale, or a note does not match the way you actually trade, write to us. We answer on UK business days.

Contact Ontarictensor