Resources Resources Access to really useful resources including: calculators, tax rates and allowances, market data and a guide to legal jargon. Online calculators Includes calculators for mortgages, loans, APR, payslips, VAT, stamp duty, company car and fuel benefits. Downloadable forms Some useful forms from HMRC and Companies House. Jargon buster Discover the meaning of any legal terms you don't understand. Market data This includes the latest statistics and rates of annual inflation, annual earnings, exchange rates, FTSE 100 index, house price index, interest rates and retail price index. Tax rates & allowances The latest tax rates and allowances.