UK Business & Self-Employed Calculators

Sole traders, contractors, and small businesses in the UK navigate self-assessment (with its 31 January balancing payment plus payments on account that surprise first-time filers), VAT registration triggered at £90,000 turnover, the flat-rate VAT scheme as a simpler alternative for smaller businesses, and the ongoing margin/markup/pricing decisions that decide whether a product is viable. The calculators in this hub cover each piece — self-assessment for the year-end tax bill, VAT for either side of a transaction, margin and markup for pricing, and break-even for the unit volume needed to cover fixed costs.