Last Updated on 4 August 2026
For the entrepreneurs out there
Whether you are an aspiring entrepreneur or running a small side hustle for some extra income, we have several resources for small businesses. Our small business resources section provides guidance about business structures and tax obligations for small business owners. If you are looking to expand your team, you’ll find information breaking down the costs of hiring employees plus details of allowable and disallowable business expenses.
Self-employment – business structure
Learn about business structure options for self-employment, the tax implications and other aspects of running a small business.
Self-employed tax and national insurance
Tax and National Insurance differ for self-employed individuals depending on the business structure you use for your business.
UK staff cost calculations
If you are running a small business, it is vital to understand the full UK staff cost calculations before recruiting an employee.
Employer NI from April 2025
From April 2025, changes to employer national insurance rates will increase employer NI for many, while smaller businesses may see a decrease in their NI costs.
Side hustles and savings interest
If you have income over £1,000 from a side hustle or savings interest, you may need to complete an annual Self Assessment tax return.
How to do payroll calculations
Are you running payroll and are unsure of the calculations behind the software? Learn more about how payroll deductions and national insurance contributions are calculated.
Allowable and disallowable business expenses
Make sure you understand which business expenses are tax-deductible. Learn more about allowable and disallowable business expenses on our sister website MQCalcs.
We have several calculators for self-employed individuals and business owners in the small business resources section of our financial calculators.
Designed to help small business owners manage their employee costs, they are a useful resource to help you make better financial decisions.
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We have several Excel spreadsheet resources in our shop, specifically for self-employed individuals and small business owners.
Track your tax and national insurance liability with our self-employed tax calculator or budget your employee costs with our staff cost budget resources.
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