This document summarizes an analysis of tax compliance in Rwanda using administrative data. It finds that VAT and PAYE make up the largest contributions to tax revenue. About 60% of personal income tax and 85% of corporate income tax comes from the top 10% of taxpayers. Audit rates vary by tax type, from around 10% for VAT to 2-3% for personal and corporate income tax. The document then outlines two planned experiments to identify drivers of tax compliance. Experiment 1 involves sending letters with information about sanctions to 1,000 taxpayers. Experiment 2 will test different message framings and delivery methods to see their impact on reported income. The goal is to identify effective interventions to potentially scale up compliance.