Whether it's a few shares over the threshold or a full portfolio, Taxfix calculates your capital gains accurately and surfaces every allowance you're entitled to.
"My assigned accountant was incredibly helpful and was able to get my self-assessment sorted quickly. This included reporting some capital gains for which I didn't understand the ins-and-outs, but my accountant just asked for the documents they needed to proceed and sorted everything. Easy and rapid."
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We can help everybody that needs to file a tax return: first-time filers, self-employed, freelancers & contractors investors, construction workers, high earners (£100K+), landlords (inc. Airbnb hosts), expats, couriers, drivers and many more.
HMRC don't make it easy. We do. Here's how three simple steps get your first Self Assessment done and dusted.
And we mean a few. After a couple of minutes of answering questions online we’ll have everything we need to start preparing your tax return.
Select the support that fits your needs – from basic accurate filing to full HMRC defense and ongoing tax optimisation throughout the year.
Meet your dedicated accountant who takes over from here – checking accuracy, maximising deductions, and filing with HMRC. You’re in expert hands.
Each accountant is vetted before they can join our superstar community. Most own their own practice, all have 5+ years industry experience.
All plans include accurate filing. Up to 40% off for new customers when purchasing an annual plan. T&Cs apply.
Expert sign off included, so you know it’s right
Get startedAccountant prepares & files your Self Assessment
Accuracy Guarantee
Message your accountant during filing
If your situation is straightforward, this is enough.
We find what you’re owed, and protect you if HMRC asks questions
Get startedEverything in Prepared & Filed Accurately
Deduction & relief optimisation + strategic tax-planning call
Full HMRC protection (audit + letter support)
Most filers choose this – if you’d rather not leave money on the table.
An accountant on retainer, helping you stay on top of your tax position all year
Get startedEverything in Filed, Optimised & Protected
Year-round access to your accountant
Annual tax efficiency review
HMRC agent representation
If your situation is more complex, or you want year-round accountant support.
| Prepared & Filed Accurately | Filed, Optimised & Protected | Filed + a Year-Round Tax Partner | |
|---|---|---|---|
| Price | £99 | £149 | £349 |
| Accountant prepares and files your return | |||
| Accuracy Guarantee | |||
| HMRC integration | |||
| Tax optimisation, delivered through a consultation call with your accountant | |||
| HMRC audit & letter support | |||
| UTR Registration | |||
| Year-round accountant access & annual tax efficiency review | |||
| HMRC agent representation | |||
| Accountant access | Messaging while filing your return | Messaging on anything related to your return + consultation call | Year-round messaging and scheduled calls, any tax topic |
All of our tax return services are filed by a UK-accredited accountant and covered by our Accuracy Guarantee.
Upload a previous year’s tax return and find out where you could have saved money.
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Here are some common questions we've gotten from first-time filers like you.
The type and amount of tax you pay depends on what kind of investment income you’re earning. This can include Income Tax, Capital Gains Tax, and/or Dividend Tax
If you’re invested in a small business or start-up that is part of the Enterprise Investment Scheme (EIS), you’ll be eligible for EIS loss relief if the business fails. It’s a type of tax relief available to you when you sell your shares of an EIS business at a loss. The tax relief allows you to reduce the amount of tax you pay to HMRC
A dividend is a sum of money you might receive if you own shares in a profitable limited company. There is a yearly tax-free dividend allowance, which for the year 2025/26 is £500. This means you won’t need to pay tax on any dividend income under £500. If you do make more, you pay tax based on what salary band you fall into and will need to report it to HMRC through a tax return.
Depending on your situation, you could need to pay Capital Gains Tax and/or Income Tax. If you’re only spending, selling or exchanging crypto, you’ll likely only owe Capital Gains Tax on your profits over £6,000 because HMRC considers crypto an asset in this instance.
If you’re mining, staking, getting paid in crypto or receiving crypto airdrops, you’ll probably owe Income Tax on earnings above £12,570 (your Personal Allowance) because HMRC considers these actions earning an income.
HMRC considers regular trading an income-generating activity, which means you’ll likely need to pay Income Tax and National Insurance Contributions on earnings more that £12,570.
Investing, on the other hand, is seen as more of a one-off type transaction and more likely to be subject to Capital Gains Tax
“Payment on Account” means that you pay tax in two instalments:
First in January (the usual deadline for paying the tax bill for last year), second in July.
In your first year as self-employed, you will likely have to pay 150% of your tax bill in one go.
For example: your tax bill for 2019/20 is £9,000. You need to pay this in full by January 31st 2021, but you also need to pay an additional advance payment of £4,500 (50% of £9,000) at the same time.
Finally, you have to pay another £4,500 by July 31st 2021.
Basically, it's an advance payment. If you turn out to earn less or more this tax year, HMRC will adjust it for you, and refund if needed.
Also, if you earn more than 80% of your income through PAYE, you won't need to use Payments on Account.
Yes.
For example: you works as a restaurant waiter in the morning and drive an Uber in the evenings. You will have to file a tax return for your Uber income.