How to Tackle Debt by Increasing Your Income: Practical UK Options
Published 5th of February 2011·Updated 18 April 2026
Reviewed by: Reviewed for accuracy April 2026
Increasing your income is one of the most effective ways to clear debt faster, alongside reducing your outgoings. In the UK, you can earn up to £1,000 per tax year from trading activities without paying income tax on it, under HMRC's trading allowance. Beyond that threshold, you must register as self-employed and submit a self-assessment tax return.
Short Summary
There are two broad categories of extra income: tax-free (below the £1,000 trading allowance or from selling personal possessions) and taxable (anything above the allowance from regular trading activity).
HMRC requires you to register for self-assessment by 5 October following the tax year in which you started earning. Missing this deadline can result in a penalty, even if you owe no tax. Register at gov.uk/register-for-self-assessment.
Asking your current employer for a pay rise or additional hours is often the fastest and simplest route to extra income. If you have not had a salary review in the past 12 months, it is worth raising the conversation.
Before taking on significant extra work, check whether it affects any benefits you receive. Some benefits are reduced as earned income rises. The benefits calculator at Turn2us.org.uk can help you model the impact.
What income can I earn without paying tax?
HMRC's trading allowance lets you earn up to £1,000 per tax year from self-employment or trading without declaring it or paying tax. If you earn more than £1,000, you must declare all of it (not just the amount above the threshold) through self-assessment.
A separate allowance applies to property income (such as renting a room), also set at £1,000 per year. And income from selling personal possessions you already own - old clothes, books or furniture - is generally not treated as trading income at all, provided you are not buying goods specifically to resell them at a profit.
| Income type | Tax position |
|---|---|
| Selling personal possessions (eBay, car boot, etc.) | Generally not taxable - you are not trading |
| Trading income below £1,000/year | Covered by the trading allowance; no tax due |
| Trading income above £1,000/year | Taxable; self-assessment required |
| Renting a room under the Rent a Room scheme | First £7,500 per year is tax-free |
| PAYE employment (second job or overtime) | Taxed through payroll at your marginal rate |
What is the fastest way to earn extra money to pay off debt?
The fastest options involve selling things you already own rather than building a new income stream from scratch.
Selling unwanted electronics, clothing, furniture and collectables through platforms such as eBay, Facebook Marketplace and Vinted requires no upfront investment and can generate cash within days. Mobile recycling comparison tools - such as those on MoneySavingExpert - can help you find the best offer for old phones and tablets across multiple recycling services simultaneously.
Car boot sales are another quick option. Pitch fees typically range from £5 to £15, and selling a car load of unwanted household items in a single morning is realistic. Check carbootjunction.com for sales near you.
What are the best gig economy options for extra income?
The gig economy offers flexible ways to earn around your existing commitments. Delivery driving is one of the most accessible; Amazon Flex, Deliveroo, Stuart and Just Eat all accept applications regularly and allow you to choose your own hours.
Other options include: freelance work on platforms such as Fiverr or PeoplePerHour (useful if you have a professional skill such as writing, design, translation or bookkeeping), mystery shopping through agencies such as GfK and Ipsos, and renting out a spare room under HMRC's Rent a Room scheme, where the first £7,500 per year is completely tax-free.
What are the tax rules for a second job or self-employment?
If you take on a second PAYE job, your employer will usually put you on an emergency tax code until HMRC issues the correct one. This can result in overpayment of tax initially, which you can reclaim from HMRC. Make sure you give each employer a P46 or, if you have your P45, provide that to your new employer.
If you are self-employed (including gig work such as delivery driving or freelancing), you must register with HMRC by 5 October following the tax year you started. You will then complete a self-assessment tax return each year. The deadlines are 31 October for paper returns and 31 January for online returns - both for the tax year ending the previous 5 April. Failure to submit on time results in an automatic £100 penalty, plus interest on any tax owed.
You may also need to pay Class 2 and Class 4 National Insurance contributions on self-employed profits above certain thresholds.
How do I ask for a pay rise to help clear debt?
Asking for a pay rise is often the most effective route to a sustained income increase, yet many people avoid it because it feels uncomfortable. Prepare before the conversation: research market rates for your role using sites such as Glassdoor, Totaljobs or Reed, note your recent achievements and any additional responsibilities you have taken on, and choose a good moment - ideally after a successful project or ahead of a scheduled performance review.
If a pay rise is not possible, ask about overtime, a bonus scheme, or whether any untaken employee benefits (such as a salary sacrifice pension or cycle-to-work scheme) could effectively increase your take-home pay.
FAQ
Can I sell things on eBay without paying tax?
In most cases, yes - selling personal possessions you no longer want is not treated as trading by HMRC. However, if you regularly buy items specifically to sell at a profit, HMRC may classify this as trading, in which case the income above £1,000 per year becomes taxable. HMRC published updated guidance on this in 2024 as part of new rules requiring digital platforms to report seller information.
How much can I earn from a side hustle before I need to register as self-employed?
You need to register as self-employed if your trading income exceeds £1,000 in a tax year. The registration deadline is 5 October following the end of that tax year. You register through HMRC's online service at gov.uk.
Will extra income affect my Universal Credit or other benefits?
Possibly. Under Universal Credit, every £1 you earn above your work allowance (if you have one) reduces your payment by 55p. Other benefits have different rules. Use the Turn2us benefits calculator or contact Citizens Advice before taking on extra work if you receive means-tested benefits.
What is the Rent a Room scheme?
The Rent a Room scheme allows you to earn up to £7,500 per year tax-free by renting out furnished accommodation in your own home. You do not need to own the property, but you do need your landlord's permission if you are a tenant. If you earn more than £7,500, you must declare the full amount (not just the excess) through self-assessment.
Do I need to pay National Insurance on self-employed income?
Yes, once your self-employed profits exceed the Small Profits Threshold (£6,725 in the 2024/25 tax year). Class 2 National Insurance is a flat weekly amount, and Class 4 is a percentage of profits above the lower profits limit. Both are calculated as part of your self-assessment tax return.