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Tax & Company

Self-Employed Tax Planner

Your tax bill, payment dates and monthly savings plan

£20

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Self-Employed Tax Planner

Overview

If you're self-employed, nobody takes tax off your income as you earn it – you pay it yourself through Self Assessment, usually in large lump sums on 31 January and 31 July. The rules on payments on account mean the January payment can be far bigger than people expect. This planner estimates your income tax, National Insurance, student loan and High Income Child Benefit Charge for the year, sets out every Self Assessment payment with its due date, and turns it all into one simple figure: how much to put aside each month so the money is there when HMRC wants it.

Price
£20
Who it’s for
Tax & Company
Works with
Microsoft Excel for Windows and Mac
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See how it works

A walk through the main sheets

The sheets you will use most, in the order you will use them – shown with the sample data every workbook comes with.

Step 1

Computation

The full step-by-step tax computation: income, allowances, taxable income, income tax, NI and other charges. What you do: nothing to enter – use it to see how the answer is built up.

Computation
Payment Schedule

Step 2

Payment Schedule

Every Self Assessment payment with its due date and amount, the total still to save, and a 24-month savings plan with chart. What you do: nothing to enter – read it and plan your savings.

Step 3

Step 4

Who it is for

Made for people like you

  • Example – text
  • Sole traders – Tax and Class 4 NI on your profits, with the payment dates and a monthly savings target.
  • Partners in a partnership – Your share of partnership profit taxed alongside any other income.
  • People with a job and a side business – PAYE income and tax already deducted taken into account, so you only save for what's left.
  • Anyone with rent, savings or dividends too – All your income in one computation, with the right allowances and rates.
  • Anyone dreading January – A 24-month savings plan and tax pot chart so the 'double January' payment is never a shock.

Quick start

Up and running in minutes

  1. Example – text
  1. Your income – On the Tax Planner sheet, choose the tax year and enter your self-employed profit (an estimate is fine during the year) plus any other income – employment, rent, savings interest and dividends.
  2. Other details – Fill in the OTHER DETAILS box: pension and Gift Aid payments, Scottish taxpayer, student loan plan, children, voluntary Class 2, last year's Self Assessment bill, payments on account already made and money already saved.
  3. Read the answer – The four tiles show your total tax and NI, what's payable through Self Assessment, the next payment due and how much to save each month. The sentence below them highlights the big January payment.
  4. Check the detail – The Computation sheet shows every step of the calculation; the Payment Schedule lists every payment and your monthly savings plan.
  5. Set up a standing order – Move the 'Save each month' amount into a separate savings account every month.
  6. Update it regularly – Re-enter your profit estimate every few months as the year goes on.

Key features

  • Income tax on profits, employment, rent, savings and dividends with 2026/27 rates, plus Class 4 and voluntary Class 2 NI.
  • Pension and Gift Aid relief, the personal allowance taper, student loans and the High Income Child Benefit Charge.
  • Every payment on account and balancing payment with due dates – including the 'double January' payment.
  • A monthly savings plan and tax pot chart so you're never caught short.

What’s included

  • Tax Planner – Inputs, the answer and chart
  • Computation – Full tax computation
  • Payment Schedule – Due dates and savings plan
  • Tax Rates – Rates and allowances
  • Guide – How to use this workbook

How buying works

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