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When and how to measure a habitat or development’s impact on biodiversity.
Find out how interest is calculated and applied if you have a Plan 4 student loan, as well as previous interest rates.
How to tax a beneficial loan arrangement for a director or employee.
Find out how to calculate the weight of your aggregate and deduct the weight of added water for Aggregates Levy.
Calculate the deemed employment payment for private sector engagements where the off-payroll working rules (often known as IR35) apply.
How to work out your taxable capital gain or loss if you are not resident in the UK and are making direct or indirect disposals of UK property or land.
The MacKay Carbon Calculator provides a model of the UK energy system that allows you to explore pathways to decarbonisation, including net zero by 2050.
Find out if simplified expenses suits your business. Compare what expenses you can claim using simplified expenses with what you can claim by working out the actual costs.
This guidance helps pension fund trustees and managers prepare an annualised version of the accrued pot value for members with certain money purchase benefits.
Calculate value build-up costs for use with the Single Administrative Document (SAD) using form C89.
How to calculate your employee's Statutory Sick Pay if you cannot use the GOV.UK calculator.
How to calculate the Income Tax, National Insurance and student loan deductions due on the disguised remuneration loan charge.
The advanced maths premium is funding for additional students studying an eligible level 3 maths qualification.
Find out how much you need to put aside for your Self Assessment tax bill if you're self-employed by using HM Revenue and Customs' (HMRC's) self-employed tax calculator.
How to work out the customs value of imported goods that are free of charge, used, rented or leased if you're an importer or clearing agent.
Calculate your part-year profits to end your Tax Credits award and claim Universal Credit if you’re self-employed
Use this form to work out interest and penalties for tax years ending 5 April 2004 to 5 April 2023.
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