Working papers
Research in progress, with the working shown.
Early models and analysis we are testing in the open. Each paper is versioned, states its method and limits, and invites your challenge.
All working papers
Working paper
Should you deregister for VAT? A break-even model
A simple model for the VAT deregistration decision below R2.3 million: one rule, three worked cases, a chart and the costs it leaves out. Version 0.1, open to challenge.
Working paperTurnover tax break-even margins for micro businesses
At what profit margin does turnover tax beat normal tax? A 2026/27 model with break-even margins from R800,000 to R2.3 million of turnover. Version 0.1, open to challenge.
Working paperWhat an employee really costs in South Africa
The cost of an employee in South Africa: statutory on-costs add about 2% to pay, but paid time off makes each productive hour cost about 37% more. Version 0.1.
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