Accountapedia is the Solar Protect encyclopedia of UK tax and accounting: a plain English reference to the tax, accounting and HMRC topics that small businesses, company directors, landlords and their accountants deal with every day. Each entry answers a real question in full, links to the related entries around it, and is kept current with UK tax rules. Use it to understand a term before a deadline, a decision or a letter from HMRC, and follow the links to go deeper.

Tax investigation insurance from £108.75 a year (£9.06 a month).Pays up to £100,000 of your accountant's fees if HMRC opens an enquiry. No excess. Buy online in a few minutes.

Solar Protect arranges tax investigation insurance, so this reference naturally leans towards the areas where HMRC asks questions. It is written to inform rather than to sell. Where a topic connects to the risk of an enquiry, we say so and link to the relevant cover, but every entry stands on its own as a useful explainer.

New to this? If you are choosing how to run a business, start with sole trader vs limited company. If HMRC has been in touch, start with what happens in an HMRC compliance check.

Browse by section

Business structure and company tax

Open the Business structure and company tax section index

Expenses, reliefs and accounting

Open the Expenses, reliefs and accounting section index

VAT

Open the VAT section index

Payroll and employment taxes

Open the Payroll and employment taxes section index

Self Assessment and deadlines

Open the Self Assessment and deadlines section index

Dealing with HMRC

Open the Dealing with HMRC section index

For accountants

Open the For accountants section index

Personal tax, property and wealth

Open the Personal tax, property and wealth section index

Income tax, savings, capital gains, property, inheritance tax and residence for individuals and families.

Accounting and standards

Open the Accounting and standards section index

UK GAAP, FRS 102 and FRS 105, bookkeeping, financial statements and audit.

Company law and admin

Open the Company law and admin section index

Companies Act duties, Companies House filings, shares, directors and insolvency.

Tax investigation insurance

Open the Tax investigation insurance section index

How this wiki connects to cover

Many of the topics here are exactly the areas HMRC examines: expenses, directors’ loans, VAT thresholds, benefits, IR35 and the way company owners take income. If HMRC opens an enquiry or a compliance check, the professional fees to defend you can run into thousands of pounds even when your figures are correct. A Solar Protect policy can cover up to £100,000 of your own accountant’s fees, with no excess, and you keep using your own accountant. To see what cover would cost, get a quote or contact us.