In Economics, the adjustment of national income measures from market prices to basic prices accounts for the impact of indirect taxes and subsidies on production. Market prices represent the prices paid by consumers, including taxes on products (like VAT) but excluding subsidies. Basic prices, however, reflect the actual revenue received by producers of goods and services, closer to factor cost.

This conversion is essential for accurate GDP valuation at basic prices, which excludes distortion from government interventions. The formula is:

Basic Prices = Market Prices – Taxes on Products + Subsidies on Products

For example, if GDP at market prices is £100 billion, with £10 billion in taxes on products and £2 billion in subsidies, then GDP at basic prices would be £92 billion. This adjustment ensures comparability in national income analysis and supports SEO-optimized study of economic indicators.