Side Hustle Tax for UK Students: Trading Allowance, Self Assessment, and Selling Personal Items

Lots of students make extra money from tutoring, reselling, content creation, or small services. Tax is simple once you know what counts as trading, how the £1,000 trading allowance works, what to do with platform sales, and when to register for Self Assessment. This guide gives you clear rules, examples, and checklists so you can earn confidently without surprise bills.

What actually counts as trading

You are likely trading if you do things with a profit motive and a pattern, such as:

• Buying items to resell for more
• Making products to sell
• Providing services like tutoring, editing, design, photography, delivery, fitness coaching
• Regular affiliate or creator income paid to you

One off sales of your own used belongings are usually not trading. See the separate section on personal items.

The £1,000 trading allowance in plain English

• You can earn up to £1,000 of gross self employed income in a tax year without paying tax on it
• If your trading income stays at or below £1,000 you usually do not need to register for Self Assessment for that income
• If your trading income is over £1,000 you must register and either
  • claim the trading allowance as a flat £1,000 deduction against income, or
  • claim your actual expenses if that gives a better result
    Pick whichever gives you the lower tax.

Example
You earn £1,600 from tutoring. Your real expenses are £120.

• Using the allowance: £1,600 minus £1,000 equals £600 taxable profit
• Using expenses: £1,600 minus £120 equals £1,480 taxable profit
  You would choose the allowance.

Do I owe National Insurance as a student

If your self employed profit stays below the relevant National Insurance thresholds you will not pay Class 2 or Class 4. If you go above a threshold, NI may become due. Many small side hustles stay below these levels, but you still need to run the numbers when you file.

Student loan repayments and side income

Self employed profit can trigger student loan repayments if your total income crosses your plan threshold. If you already repay through payroll, your final annual calculation can add a balancing amount. Keep this in mind when setting money aside.

Selling personal items on eBay, Vinted, Depop and similar

• Selling your own used personal items at a loss compared to what you paid is usually not taxable
• If you make items to sell, buy specifically to resell, or flip stock regularly, that is trading
• There is a separate per item exemption for certain personal possessions often called the chattel exemption. If you sell a single personal item for more than the exemption limit, capital gains rules can apply on the gain, not the whole sale price
• Keep proof of what you paid originally for expensive personal items and store your listings and receipts

If your platform activity looks like a business, apply the trading rules and use the trading allowance or expenses.

Platforms now report seller data

Marketplaces and gig platforms may share seller totals with the tax authority. That does not mean all sales are taxable, but it removes the option to ignore income. Keep clean records so you can show what is trading and what is personal.

What records to keep from day one

• Income log by date and platform or client
• Expense log with receipts or invoices
• Mileage or travel notes for eligible journeys
• Copies of listings, order confirmations, and payout reports
• Separate workspace or equipment notes if you claim actual costs

Use a simple spreadsheet or a basic bookkeeping app. Back up monthly.

Allowable expenses for side hustles

Claim real costs that are wholly and exclusively for your work, such as:

• Postage, packaging, marketplace and payment fees
• Materials and stock purchases
• Software subscriptions used for the work
• A fair share of phone and data used for the business
• Equipment used for the business, with capital treatment where required
• Travel to clients or events that are not your regular commute

If you choose the £1,000 trading allowance you cannot also claim expenses. You must pick one route each year.

When and how to register for Self Assessment

Register if any of these apply:

• Your total trading income is over £1,000
• You have other reasons to file, such as untaxed income or capital gains

Typical flow each year:

1. Register once you know you will exceed the allowance
2. Keep records through the tax year
3. File your return and pay any bill by the deadlines
4. If your bill is large enough, you may be asked for payments on account toward next year. Factor this into cash flow

How much money should I set aside

A simple rule is to park a percentage of each payout in a savings space for tax and NI. Many students use a ballpark of 20 to 30 percent of profit, then adjust when they know their situation. Overestimating is safer than scrambling in January.

VAT is usually not your problem

You only consider VAT when your taxable turnover approaches the VAT registration threshold. Most student side hustles sit far below this. If you grow fast or sell to businesses at scale, learn the rules early.

Common student side hustles with quick tax notes

• Tutoring
  • Income is trading. Track sessions, platform fees, and resources
• Reselling clothes or tech
  • If you buy to resell, you are trading. Keep stock purchase records and sales fees
• Commissions and freelance design
  • Invoices count as trading income. Track software costs and asset licences
• Content creation and affiliate links
  • Ad revenue and affiliate payouts are trading income. Keep platform dashboards and statements
• Crafts and prints
  • Materials, packaging, and marketplace fees are expenses. Track costs per product

Practical examples

Example A: Personal items only
You sell old course books and a used jacket for less than you paid. No trading, no taxable profit. Keep basic notes and move on.

Example B: Mixed selling
You clear old clothes, then start buying bundles to resell. Treat the resales as trading. Use the trading allowance if your total trading income stays modest, or claim real costs if your fees and postage are high.

Example C: Creator income plus part time job
You earn wages from a cafe and ad revenue from videos. Payroll handles your wages. You register for Self Assessment for the creator income, claim the trading allowance or expenses, and watch the student loan interaction at year end.

Deadlines and penalties to avoid

• Register and file on time
• Pay on time or set up a time to pay arrangement if cash is tight
• Keep your address and email up to date so you do not miss letters

Six smart habits that keep taxes easy

1. Separate space in your bank or a second account for side hustle cash
2. Save invoices and screenshots as PDFs in a dated folder
3. Reconcile monthly so the return is mostly done by year end
4. Use the £1,000 trading allowance if your expenses are tiny
5. Switch to real expenses once fees and materials grow
6. Park a tax percentage of every payout automatically

Frequently asked questions

Do I need to tell anyone if I make under £1,000
Usually no for that trading income, but keep records in case your totals change later.

Can I use the trading allowance for rental or employment income
No. It is for trading and casual services, plus a separate property allowance exists for small rental income.

What if I sell one personal item for a high price
Check the rules for personal possessions and the per item exemption. You may touch capital gains rules on the gain only.

Do gifts from family or one off reimbursements count
Gifts are not trading income. Reimbursements for shared costs are not income. Keep context in your notes.

Can I be both employed and self employed
Yes. Payroll handles your job. You file for your side hustle.

Simple checklist you can copy

• Decide if you are trading or just selling personal items
• Track income and expenses from day one
• Use the £1,000 trading allowance or actual expenses
• Set aside a tax pot from each payout
• Register for Self Assessment if you cross the line
• Remember student loan and NI interactions when you file

A small side hustle is easiest when you keep tidy records and decide early whether you are trading or just clearing personal stuff. Use the trading allowance for simple setups, switch to real expenses when fees grow, and save a slice of each payout. You will earn with confidence and avoid last minute tax stress.