Calculation settings
Set a past year to analyze a historical deal on its own terms (all maturities below are calendar years).
Existing debt to be swapped
New debt
Amount is auto-calculated from the existing debt: the cash needed to retire it (loans at par plus any prepayment fee; bonds at market price plus any premium). Upfront fees can include arrangement, guarantee, syndication, and legal costs.
Discount factor
Development commitment
The swap leg the refinancing math usually leaves out: long-term, predictable spending on health, education, or nature.
Funder support
The grant element of the guarantee, credit enhancement, or donor contribution that makes the new financing cheap.
Savings
The World Bank calculator's dashboard block, computed from the same conventions.