diff --git a/README.md b/README.md
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 <!-- badges: start -->
   [![R-CMD-check](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/R-CMD-check.yaml)
-  [![test-coverage](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/test-coverage.yaml/badge.svg)](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/test-coverage.yaml)  
+  [![test-coverage](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/test-coverage.yaml/badge.svg)](https://github.com/AngusMcLure/PoolPoweR/actions/workflows/test-coverage.yaml)
+  [![codecov](https://codecov.io/gh/AngusMcLure/PoolPoweR/graph/badge.svg?token=OCUMCG50JU)](https://codecov.io/gh/AngusMcLure/PoolPoweR)
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 Power and sample size calculations for surveys using pool testing (AKA group testing).