Simply Business homepage
  • Business insurance

    Business insurance covers

  • Support
  • Claims
  • Sign In
Call Us0333 0146 683
Our opening hours
Knowledge centre

What’s the earliest I can file my taxes? 5 reasons to send your Self Assessment early

3-minute read

Sam Bromley

21 April 2021

Share on FacebookShare on TwitterShare on LinkedIn

Filing an early tax return could be a great help to future you – and remember you don’t need to pay your bill at the same time, so you can still leave that until 31 January 2022.

Tax returns aren't fun and it's easy to see why they fall down the to-do list.

But if you’re faced with some down time, there are real benefits to filing yours early in the tax year.

What’s the earliest I can file my taxes?

If you’re wondering whether you can submit your Self Assessment early, you can actually file one for the previous tax year any time after the new tax year starts.

This means you can file a 2020-21 Self Assessment after 6 April 2021.

Here are five benefits of doing your Self Assessment early.

Get small business guides and news straight to your inbox

Your email address will be used by Simply Business so that we can send you the latest guides, offers and tips. You can unsubscribe from these emails at any time. For more information, check out the Simply Business Privacy policy.

1. Earlier refunds if you’ve overpaid tax

Payments on account are future payments towards your next tax bill, based on estimates for your previous one.

One payment on account towards your 2020-21 bill was due on 31 January 2021 and your next one is due on 31 July 2021.

But if you complete an early tax return, you know how much your bill actually is.

This helps with planning for your future payments – and if you’ve overpaid tax, you should get your refund sooner.

Read more about payment on account.

2. It’s easier to plan your finances

While restrictions are lifting, many businesses are still feeling the effects of lockdown – and small business owners recently told us that they expect coronavirus now to cost them £22,461 on average.

Knowing the actual cost of your tax bill this far in advance should help you set aside the money for paying it on 31 January 2022.

Keep in mind that last tax year, HMRC announced that people who needed more time to pay their January 2021 tax because of coronavirus would be able to set up a payment plan without contacting them.

But you could only use the service if you’d already filed your tax return.

While it’s likely that taxpayers will need to contact HMRC to use Time to Pay in the future, having a completed tax return should put you in a better negotiating position if it gets to January and you don’t think that you’ll be able to pay your bill.

Read more about HMRC Time to Pay.

3. You can minimise the risk of mistakes (and fines)

HMRC says that 26,562 people filed their tax return between 11pm and 11:59pm on the January 2020 deadline.

While leaving it late might be unavoidable for some, it does carry the risk of making more errors than necessary.

And mistakes can lead to fines. While HMRC won’t issue penalties for people who’ve taken reasonable care when filling in returns, they charge 0 to 30 per cent of the tax due if people have been careless.

4. Claim all the expenses you can

Having your records organised early not only helps you minimise the risk of mistakes. It also helps you claim all the right tax-deductible expenses.

Claiming expenses reduces your total taxable profit, meaning you pay less tax.

Allowable expenses include computer software, travel, and legal and financial costs. Doing your Self Assessment early means you can make sure you’ve included all your expenses.

Read more about allowable business expenses.

5. It gives you more time to research professional advice

You can include the costs of hiring a professional accountant or adviser as a tax-deductible expense.

If you start your tax return early and aren’t sure about the details, in the first instance you should be able to speak to someone at HMRC quicker (their phone lines are notoriously bad during Self Assessment).

But if you need more advice, it gives you more time to find the right professional to help you out.

It’s important to do your research and make sure you find someone with a great reputation, as bad advice can cost you time and money.

Their advice can help you set up a proper record-keeping system, plus their knowledge of tax and expenses could go towards reducing your overall tax liability.

Read more about hiring an accountant.

How early do you complete your tax return? Let us know in the comments below.

Updated 3 December 2021

Looking for self-employed insurance?

With Simply Business you can build a single self employed insurance policy combining the covers that are relevant to you. Whether it's public liability insurance, professional indemnity or whatever else you need, we'll run you a quick quote online, and let you decide if we're a good fit.

Start your quote

We create this content for general information purposes and it should not be taken as advice. Always take professional advice. Read our full disclaimer

Find this article useful? Spread the word.

Share on Facebook
Share on Twitter
Share on LinkedIn

People also liked

19 November 20202-minute read

Landlords could be targeted in new capital gains tax raid

Landlords could be hit by another massive tax raid, as the Office of Tax Simplification outlines its recommendations for an overhaul of…

Read more

Keep up to date with Simply Business. Subscribe to our monthly newsletter and follow us on social media.

Subscribe to our newsletter


Popular articlesBusiness resources from FarillioGeneral businessGuestInsuranceLandlordLandlord resources from FarillioLegal and financeMarketingNewsOpinionProperty maintenanceTradesmanCovid-19 business support hub


6th Floor99 Gresham StreetLondonEC2V 7NG

Sol House29 St Katherine's StreetNorthamptonNN1 2QZ

© Copyright 2022 Simply Business. All Rights Reserved. Simply Business is a trading name of Xbridge Limited which is authorised and regulated by the Financial Conduct Authority (Financial Services Registration No: 313348). Xbridge Limited (No: 3967717) has its registered office at 6th Floor, 99 Gresham Street, London, EC2V 7NG.