Debt sustainability framework for low income countries

The joint IMF-World Bank debt sustainability framework for low-income countries (LIC DSF) is a standardised methodology for assessing risks of debt distress and guiding borrowing and lending decisions. First introduced in 2005 and revised after a Board-approved review in 2017, with the revised framework becoming operational in 2018, it classifies countries by debt-carrying capacity, applies indicative thresholds to selected debt burden indicators, evaluates baseline and stress-test projections against those thresholds, and combines mechanical signals with staff judgment to assign risk ratings of external and overall public debt distress.

The LIC DSF is distinct from the IMF framework used for market-access countries (MACs). The LIC tool was developed jointly by IMF and World Bank staff for countries where concessional financing and present-value debt measures remain central. The MAC debt sustainability analysis was developed by IMF staff for emerging market and advanced economies.

Purpose of the debt sustainability framework

The objective of the LIC DSF is to support efforts by low-income countries to achieve development goals while minimising the risk of debt distress. Debt crises are costly to debtors, creditors, and the international monetary and financial system. The framework guides borrowing decisions so that financing needs are matched to current and prospective repayment capacity. It also guides official creditors and donors on lending and grant allocation terms consistent with long-term debt sustainability.

A full debt sustainability analysis (DSA) should generally be produced at least once every calendar year. For the IMF, both surveillance (Article IV) and lending (IMF programme) should be accompanied by a DSA. For the World Bank, an annually produced DSA is required to determine the IDA credit-grant allocation. The framework's effectiveness in preventing excessive debt accumulation hinges on broad use by borrowers and creditors.

Country coverage and debt-carrying capacity

The LIC DSF applies to low-income countries that have substantially long-maturity concessional debt, or to countries eligible for World Bank IDA grants. Guidance indicates DSAs using the LIC DSF template should be produced for PRGT-eligible countries that also have access to IDA resources and for countries eligible for IDA grants. A country may eventually graduate from concessional debt sustainability analysis and migrate to the MAC DSA when per capita income exceeds a threshold for a specified period or when the country has durable and substantial capacity to access international markets.

Debt-carrying capacity is classified as weak, medium, or strong using a composite indicator (CI). Under the guidance note, capacity is assessed as weak if the CI value is below 2.69, medium if it lies between 2.69 and 3.05, and strong if it is above 3.05. Stronger capacity corresponds to higher indicative thresholds for debt burden indicators.

Indicators, thresholds and risk ratings

The reformed LIC DSF uses four public and publicly guaranteed (PPG) external debt burden indicators. Solvency indicators are expressed in present value (PV) terms. Indicative PPG external debt thresholds by debt-carrying capacity are:

• Weak: PV of PPG external debt 30 percent of GDP and 140 percent of exports; PPG external debt service 10 percent of exports and 14 percent of revenue
• Medium: PV of PPG external debt 40 percent of GDP and 180 percent of exports; PPG external debt service 15 percent of exports and 18 percent of revenue
• Strong: PV of PPG external debt 55 percent of GDP and 240 percent of exports; PPG external debt service 21 percent of exports and 23 percent of revenue

The template analyses a baseline macroeconomic and financing scenario and applies stress tests. Mechanical risk signals from comparing indicators with thresholds are combined with judgment to determine external and overall public debt distress ratings. The framework also uses benchmarks for total public debt to flag risks from broader debt exposures, including domestic debt.

A July 2024 supplement to the 2018 guidance note provides additional staff guidance within the existing Board-approved architecture on climate-related risks, domestic public debt vulnerabilities, and use of the LIC DSF in debt restructuring situations, pending a deeper review of the framework.

Use by creditors and official support desks

DSAs inform IMF financing access and the design of debt limits in IMF-supported programmes. World Bank IDA grant-credit mixes also depend on DSA outputs. Official bilateral creditors and export credit agency programmes that follow OECD sustainable lending practices are expected to take the most recent IMF/World Bank DSA into account when supporting public-sector exposure in lower income countries. Arrangement Participants structuring a buyer credit or other officially supported facility under the OECD Arrangement therefore treat the DSA as an institutional input to eligibility and debt limit compliance, not as a substitute for transaction underwriting.

Where a DSA and programme parameters identify a financing gap that requires sovereign debt treatment, the analytical envelope can inform restructuring vs rescheduling choices among official and private creditors. The DSF itself does not prescribe a restructuring modality. It supplies risk ratings, projected debt service paths, and present-value assessments that creditors and programme teams use when calibrating treatment envelopes.

Desk reading

For bank and official support desks, the debt sustainability framework is a shared analytical language for LIC sovereign and public-guarantor risk. Capacity class determines which thresholds apply. Baseline and stress breaches generate mechanical signals. Final ratings combine those signals with judgment. Annual DSA production, programme debt limits, and creditor sustainable lending rules all reference the same architecture. Sustainable lending commitments under the OECD Arrangement and related creditor guidelines draw on the same DSA outputs, giving official and private creditors a common reference point when assessing public-sector exposure in low income countries.

Public and publicly guaranteed external debt remains the primary focus of the external risk rating, while total public debt benchmarks help flag domestic and broader exposures. Present-value metrics matter because concessional terms can make nominal stocks misleading for burden comparison. Financing assumptions in the baseline must be consistent with the macroeconomic framework; optimistic new borrowing terms can mask distress risk until stress tests reprice commercial financing or shorten maturities. The 2017 reforms simplified the indicator set to four external PPG measures and twelve capacity-linked thresholds, replacing a more complex pre-reform grid, while retaining the core capacity-threshold-signal-judgment sequence.