This report uses 2013–2015 International Aid Transparency Initiative (IATI) data to trace Swedish aid to Tanzania to its end use. It finds that general budget support (GBS) accounted for much of Swedish aid in 2013 and 2015, but could not determine final expenditures using IATI data. In the absence of GBS, the authors could only confirm that in 2014, 28 percent of Swedish aid arrived in Tanzania, via the government and Tanzania-based organizations. A key constraint to traceability is that Sweden does not require aid implementers to report to IATI. The report recommends that Sweden encourage such reporting.