Live measurements
- Quantity after tax
- 35.0 units
- Consumer price
- £65.0
- Producer price
- £55.0
- Tax revenue
- £350
- Deadweight loss
- £25.0
EconomicsA-Level8 minBeta
Supply, Demand & Tax Lab
Apply a per-unit tax to a linear market and inspect the new equilibrium, incidence, revenue and deadweight loss.
Model presets
Reviewed starting statesCurriculum map
- OCR A-Level Economics
Government Intervention in Markets → Indirect taxes, subsidies and price controls
Model boundaries
- Supply and demand are linear within the displayed range.
- The tax is a fixed amount per unit traded.
- There are no externalities or administrative costs in this simplified model.
StudyVector-authored linear market model for conceptual exploration; mapped to the reviewed curriculum topic shown below.
Accessible text description
A price-quantity graph shows a downward-sloping demand curve and upward-sloping supply curve. Pre-tax and post-tax equilibria are labelled. A vertical wedge separates the consumer and producer prices. Optional shaded regions identify government tax revenue and deadweight welfare loss, with all values repeated in a measurement panel.