IDA's performance-based allocation (PBA) shares the IDA envelope across countries using CPR3 × GNI per capita−0.125 × population, plus a base allocation per country and FCV allocations. Adjust the formula to see who gains and loses compared with the FY25 formula, holding the total envelope and FCV allocations fixed.
Change compared with the FY25 formula. Each point is a country, sized by population. Hover or tap a point for details.
Correlation (Pearson) between allocation per person and the share of people living below $3 a day, across all countries. Higher means allocations per person are more concentrated where poverty rates are high.
| Allocation measure | FY25 formula | Your settings | Change |
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"Formula only" is the performance-based portion; "+ base" adds the base allocation; "+ FCV" adds FCV allocations. Countries excluded by a cutoff count as zero. Poverty rates are World Bank PIP nowcasts (2021 PPP), which for some countries extrapolate from old surveys.
Share of the total allocation going to countries on the World Bank's FY25 list of fragile and conflict-affected situations (FCS), in total and for the list's two categories: conflict, and institutional and social fragility.
| Countries | FY25 formula | Your settings | Change (pts) |
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Covers the FCS countries in the model. Myanmar, Syria, Eritrea and Zimbabwe are on the list but outside the model; the other listed economies are not funded through IDA's performance-based allocation. FCV allocations are held fixed and countries excluded by a cutoff count as zero. Source: World Bank FCS lists.
SDR million. FY25 allocations are as modelled from the published FY25 inputs and match the published allocations to within rounding. Excludes Eritrea and Zimbabwe (non-accrual), Syria (no data) and Myanmar (ad hoc adjustment). Pakistan is capped at 6.88% of the total.
Change one country's GNI per capita or CPR to see how its allocation responds, and what change in the other variable would have the same effect.
Each point on the line has the same effect on 's allocation: the GNI per capita change on the horizontal axis and the CPR change on the vertical axis. The marker shows your current choice.
Two changes have the same effect when they give the country the same raw score (CPR3 × GNI per capita−0.125), because nothing else in the formula changes. So the equivalent CPR change is CPR × (multiplierGNI exponent / CPR exponent − 1). This does not hold if the GNI change moves the country across a cutoff.