The European Union pursues an economic recovery strategy with explicit environmental considerations but less clear alignment with broader sustainable development objectives. Using as a case study one national Recovery and Resilience Plan of an EU country that was published in May 2021, we perform a rapid but detailed sustainability assessment of its measures. This method is embedded in a broader framework that combines ex-post sustainability assessments of international organisations with ex-ante assessments of multi-year public budget plans. At times when policymakers need immediate advice, this framework helps identify weaknesses and guide the inclusion of sustainability-oriented policies in national budgets.