New Tax Year Checklist For Sole Traders

The tax year just turned.

Whether you are registering as self-employed for the first time or simply starting a new year with a fresh set of records, the first week of April is the most valuable week in your financial calendar. What you set up now determines how organised, how in control and how prepared for January you will be for the next twelve months.

Most sole traders do nothing in this first week. They wait until they have their first invoice to worry about their bookkeeping system. They wait until October to think about their tax position. They wait until January to find out what they actually owe.

This post is for the ones who want to do it differently.

Five things. One week. Everything in place before you record your first transaction.

1. Set Up Your Bookkeeping System Before You Need It

This is the single most valuable thing you can do in the first week of the new tax year.

Not because it is complicated. Because doing it before your first transaction means every record you keep from day one is clean, consistent and complete. Doing it after, after three months of transactions, after receipts have been lost, after you have forgotten what that payment in May was actually for, is significantly harder and significantly less reliable.

Your system does not need to be sophisticated. It needs to do four things. Record every pound that comes in. Record every legitimate business expense that goes out. Calculate your estimated tax position so January is never a surprise. And produce a record that protects you if HMRC ever asks questions.

A well-built spreadsheet does all four. The UK Sole Trader Tax Template is designed specifically for this. Open it today, save it with your name and the tax year, and it is ready the moment your first payment arrives.

If you already have a system from last year, now is the time to reset it. Clear the previous year's transactions, carry nothing over, and start 2026/27 with a clean file. Last year's records belong in a separate saved copy that you keep for at least five years. This year's records start fresh.

The action: Set up or reset your bookkeeping system this week. Not when your first invoice arrives. Now.

2. Open a Separate Tax Savings Account

If you do not have one already, open a separate bank account specifically for your tax savings today.

Not a savings pot inside your main banking app. A separate account at a different bank, where the slight friction of logging in separately acts as a natural barrier against spending it.

Here is why this matters more than almost anything else on this list.

As a sole trader, no one deducts tax from your income before it reaches you. Every pound you earn lands in your account in full. The portion that belongs to HMRC sits there looking exactly like money you can spend. Because it is in the same place as money you can spend. Because there is nothing physically separating the two.

The sole traders who consistently meet their January bills without stress share one habit above all others. The tax money is in a separate place. It does not feel available to spend. When January arrives it is a transfer, not a crisis.

Set a transfer amount now. A rough starting point is 25 to 30 percent of your profit each month. If you use the UK Sole Trader Tax Template, the Tax Planner calculates your actual estimated rate based on your specific profit level and shows you the real January figure including any payment on account. Use that figure to set your monthly transfer rather than a generic percentage.

The action: Open a separate tax savings account this week. Set a recurring monthly transfer reminder in your calendar for the same date each month.

3. Check Your National Insurance Record

This takes five minutes and most sole traders never do it.

Go to gov.uk and search for Check your State Pension forecast. Log in with your Government Gateway account and look at two things. Your current State Pension forecast. And your National Insurance record, specifically whether there are any gaps.

You need 35 qualifying years of National Insurance contributions to receive the full State Pension. Each year you have gaps in your record is a year that is not counting toward that total.

If your profits in any tax year fall below £6,845, that year does not automatically qualify. You can fill gaps by paying voluntary Class 2 National Insurance contributions at £182 per year. That £182 translates to approximately £328 of additional State Pension every year for the rest of your life.

Do this check at the start of every tax year. Note whether last year qualifies based on your profit level. If it does not, consider whether the voluntary contribution is worth making. For most sole traders with any prospect of reaching State Pension age, it almost always is.

The action: Check your National Insurance record this week. Five minutes. Potentially hundreds of pounds of annual State Pension income protected.

4. Confirm Your Accounting Year End Date

Your accounting year end date is the date your annual accounts close. If it is 31 March or 5 April, it aligns perfectly with the tax year and you can stop reading this section.

If it is any other date, it is worth understanding what that means for your tax return.

From April 2024 HMRC moved all sole traders onto the tax year basis. This means your taxable profit is always the profit you made in the tax year itself, 6 April to 5 April, regardless of when your accounting year ends. If your accounts do not align with the tax year, you will need to apportion profit from two different accounting periods every time you complete your Self Assessment return. Your tax return profit figure will not match either set of accounts directly. This adds a calculation step to every return you file indefinitely.

There is no tax advantage to a non-April year end for most sole traders. The only reason to use a different date is if your business has a strong seasonal pattern and it makes practical sense to close accounts at a natural break point in your trading cycle.

If you are just starting out, choose 31 March or 5 April as your year end now. If you already have a different year end and want to change it, speak to an accountant about the transition. The earlier in your trading life you make the change the simpler it is.

The action: Confirm your accounting year end date. If it is not 31 March or 5 April and you are in your first year, change it now before it matters.

5. Set Your Tax Set-Aside Rate Based on Your Actual Position

Most guides tell sole traders to save 25 to 30 percent of income for tax. That is a reasonable starting point. It is not always the right number for your specific situation.

Here is when 25 to 30 percent is wrong.

If your profit will stay below £12,570, the personal allowance, you owe no income tax at all and only potentially voluntary Class 2 National Insurance. Saving 30 percent of a £10,000 profit means accumulating £3,000 in a tax account when your actual bill might be close to zero.

If your profit will push above £50,270 into the higher rate band, 30 percent across the board is not enough. Your effective combined rate on the higher rate portion is around 42 percent. A 30 percent set-aside will leave you short in January.

If you have a student loan, your repayment is calculated on your Self Assessment return and due in January alongside your tax bill. A 30 percent set-aside does not include this.

And if this is your second year of trading and your first tax bill exceeded £1,000, your January bill this year will include a payment on account, an additional 50 percent of last year's bill on top of this year's tax. A 30 percent set-aside on this year's income alone will not cover both.

The right set-aside rate is the one calculated from your actual profit level, your specific tax position and your student loan status.

The UK Sole Trader Tax Template does this calculation for you. Enter no numbers manually. Your profit pulls from your records automatically. Your income tax, Class 4 NI, student loan repayment, payment on account and complete January total calculate themselves. You can see the real figure from day one of the tax year and set your monthly transfer accordingly.

The action: Work out your actual set-aside rate this week rather than applying a generic percentage. If your profit level, student loan status or payment on account position means 30 percent is wrong for you, set the right number now while there are twelve months to save it.

The Week That Sets Up the Year

None of these five things takes more than an hour combined.

A bookkeeping system ready before the first transaction. A separate tax savings account with the right transfer amount. A National Insurance record check. A confirmed year end date. A set-aside rate based on your actual position rather than a generic rule.

Do all five this week and the rest of 2026/27 is significantly more manageable. The sole traders who find January straightforward are not the ones with the most sophisticated systems. They are the ones who did the basics properly at the start of the year and then kept up with them consistently.

The basics are not complicated. They are just easy to leave until later.

Later is now last year. This week is the right time.

Ready to Set Up Your System?

The UK Sole Trader Tax Template gives you everything described in point one and point five of this post, built and ready to open. Income Tracker, Expense Tracker, Monthly Summary, Tax Planner with confirmed 2026/27 rates and student loan calculations for all plan types, and a Dashboard showing your complete January bill at any point during the year.

Your profit calculates automatically. Your tax position updates as you record transactions. January stops being a surprise.

Get the UK Sole Trader Tax Template — £9.99 →

Blog content is for information purposes only and over time may become outdated as the tax landscape is constantly changing, although we do strive to keep it current and up to date. It is written to help you understand your taxes and is not to be relied upon as professional accounting, tax and legal advice. For additional help please contact a professional adviser.