The Hundred-Billion-Dollar Machine
Inside IDA's record $100 billion replenishment, where the money is going, and the hiring surge it creates across 78 countries
MDB jobs disappear fast. Are you tracking the latest openings?
Subscribe to the Premium Plan and never miss an opportunity:
Get Staff roles on Mondays
Get Consultant roles on Fridays
Grab a free trial here to see what you’ve been missing (no payment required).
In December 2024, finance officials from 59 countries gathered in Seoul for a meeting that most people outside development circles have never heard of. They were there to replenish the International Development Association, a fund that has quietly shaped the trajectory of the world’s poorest countries for more than six decades. By the time they left, they had pledged $23.7 billion. That figure, through a financial mechanism that amounts to one of the more elegant tricks in public finance, would become $100 billion.
The setting was deliberate. South Korea is an IDA graduate. In 1960, the year IDA was created, South Korea’s per capita GDP was $158. The country was recovering from war, dependent on foreign assistance, and eligible for exactly the kind of concessional financing IDA provides. By 2023, its per capita GDP had reached $33,121. Seoul hosted the replenishment as living proof of the thesis: that patient, subsidised capital, deployed well, can transform an economy within a generation.
IDA was born in 1960 out of a practical problem. The World Bank, formally the International Bank for Reconstruction and Development, lent at near-market rates. The poorest countries on earth could not afford those terms. They needed grants and deeply discounted loans, the kind of financing that no commercial lender would offer and that the IBRD could not provide without damaging its own credit position. IDA was the solution: a separate window within the World Bank Group, funded by periodic donor contributions, lending on terms so generous that much of its financing now comes as outright grants.
For decades, IDA operated as a straightforward revolving fund. Donors put money in every three years, IDA lent it out on 30- to 40-year terms with minimal interest, and as old loans were repaid, the capital recycled. The model was reliable but limited. Every dollar of lending required roughly a dollar of donor contribution, which meant that IDA’s scale was capped by what rich-country parliaments were willing to appropriate.
Then, in 2016, shareholders agreed to a transformation. IDA would begin borrowing on capital markets. The logic was that IDA sat on a vast balance sheet of outstanding loans, all backed by sovereign borrowers, and had a pristine repayment record. Why not use that equity as collateral to issue bonds? In April 2018, IDA debuted in global capital markets with a $1.5 billion bond, nearly five times oversubscribed. Investors wanted in. Moody’s and the other agencies assigned a triple-A rating. Since then, IDA has issued bonds in six currencies and raised $19.1 billion in fiscal 2025 alone.
This is the leverage at the heart of IDA21. Each dollar that donors pledge can be multiplied roughly four times through capital-market borrowing and the recycling of repayments on old loans. It is why $23.7 billion in pledges becomes $100 billion in deployable capital. And it is why IDA is sometimes called “the best deal in development”: a dollar of taxpayer money in London or Tokyo generates four dollars of investment in a school in Chad or a power grid in Mozambique.
Ajay Banga, the World Bank’s president since June 2023, had pushed hard for a record round. He secured it despite what he described as “major political turnover across many of its key shareholder countries and a deeply unsettled global environment.” The United States pledged $4 billion, up from $3.5 billion in the previous round. The United Kingdom increased its contribution by 40 per cent. Croatia doubled its pledge. Norway raised its commitment by half. Ten donors increased by 40 per cent or more. In a period of shrinking aid budgets, mass layoffs at USAID, and deepening scepticism about foreign assistance in several Western capitals, IDA’s ability to attract more money from more countries was a striking counter-current.
The timing matters. IDA21 covers the period from July 2025 to June 2028, a window during which the development landscape has become considerably more hostile. The USAID shutdown in early 2025 removed the largest bilateral donor in history from the field. Over 200,000 staff globally lost their positions. Implementing partners, from Catholic Relief Services to Save the Children, faced severe budget cuts. The bilateral aid architecture that had operated alongside multilateral institutions for decades was, in significant parts, dismantled. Into that gap, IDA’s $100 billion looms larger than the headline number alone suggests. For many of the 78 eligible countries, IDA is now not merely the largest source of concessional finance but, in some cases, close to the only reliable one.
The money has three stated priorities. First, electricity: Mission 300, a joint initiative with the African Development Bank, aims to connect 300 million people in sub-Saharan Africa to power by 2030. The World Bank is responsible for 250 million of those connections, the AfDB for the remaining 50 million. IDA is channelling $30 billion toward African energy projects over the replenishment period. In March 2026, the two banks and the Rockefeller Foundation launched a Private Sector Council to mobilise the additional billions that the public money alone cannot cover. Since the initiative launched in 2024, 44 million people have been connected. The remaining 256 million will be harder. They live in more remote areas, in countries with weaker grid infrastructure, in places where the commercial case for connection is thinnest. This is precisely the terrain IDA was built for.
Second, health: IDA21 targets improved health services for 1.5 billion people. In a post-pandemic world where health systems in low-income countries remain fragile, this involves everything from vaccine supply chains to primary care facilities. The scale is difficult to grasp. 1.5 billion is roughly the combined population of India and every country in sub-Saharan Africa.
Third, social protection: safety nets for 500 million people facing recurring shocks. With the Strait of Hormuz crisis driving energy and food prices upward across developing Asia and Africa, with climate events intensifying, and with the loss of USAID-funded humanitarian programmes, the demand for cash transfers, food assistance, and emergency employment schemes has never been higher.
Banga’s strategy for converting this capital into outcomes rests on three pillars he has repeated in various forums: infrastructure as the starting point, business-enabling reforms to attract private investment, and catalytic capital to bridge the gap between public resources and private returns. The approach reflects his background. Before the World Bank, Banga spent 30 years at Mastercard and Citigroup. He thinks in terms of leverage, scalability, and private-sector mobilisation. Under his leadership, the Bank has been explicit that IDA money is meant to crowd in private capital, not replace it.
There is also an operational reform story embedded in IDA21 that receives less attention but matters for anyone working inside the system. The Bank has halved its policy requirements, cutting them from 1,100 to 500. The aim is to reduce the bureaucratic load on borrowing countries: fewer reporting metrics, fewer conditions attached to each tranche, less time spent on compliance paperwork and more on implementation. A new IDA Grant Facility for Project Preparation will help countries develop proposals faster, with the Bank committing to reduce project preparation time to under 12 months. For those who have worked inside the system, where a project can take two to three years to move from concept to first disbursement, this is a significant shift.
For professionals in the development sector, IDA21 creates a distinct set of opportunities. The sheer volume of new commitments, $100 billion over three years, requires an expanded workforce to design, appraise, supervise, and evaluate projects across 78 countries. The areas of focus (energy, health, social protection) each demand specialists: power engineers and grid planners for Mission 300, health economists and supply-chain managers for the health portfolio, social protection experts and data analysts for the safety-net programmes.
The procurement pipeline alone is substantial. Every IDA-funded project involves contractors, consultants, and implementing partners, selected through the World Bank’s procurement framework. For consulting firms, engineering companies, and NGOs that serve as implementing partners, IDA21 represents the largest single source of contract opportunities in the development sector over the next three years.
The streamlining reforms also change the nature of the work. Fewer policy conditions mean less demand for compliance specialists and more demand for people who can deliver results on the ground. The Bank is signalling that it wants operational talent: project managers who can execute, not just analysts who can write policy papers. For job seekers, this is worth noting. The profile the institution is hiring for is shifting toward implementation expertise.
There is a risk embedded in all of this. IDA21 was negotiated before the full extent of the USAID collapse was clear, before the Strait of Hormuz crisis drove energy prices to levels that threaten fiscal stability across the developing world, and before the broader retreat from multilateralism in several donor capitals had fully materialised. The $100 billion is a three-year commitment, but the world has a habit of changing faster than replenishment cycles. If a major donor defaults on its pledge, or if the AAA rating that underpins IDA’s capital-market borrowing comes under pressure, the arithmetic unravels.
The Centre for Global Development flagged this risk in a December 2024 analysis noting that “IDA prevails while others flail,” a reference to other multilateral funds that failed to meet their replenishment targets in the same period. IDA’s success, in other words, is partly a reflection of other institutions’ failure. Donors are concentrating their commitments where they see the most efficient use of scarce aid budgets. That concentration makes IDA more important but also more exposed. If something goes wrong at IDA, there is no comparable backstop.
For now, the machine is running. The bonds are issuing. The projects are entering the pipeline. Across 78 countries, from Afghanistan to Zambia, the largest infusion of concessional finance in history is beginning to flow. Whether it reaches the people it is meant to serve, at the speed and scale the moment demands, is the question that will define the next three years of international development.
Make sure you subscribe to MDB Jobs to get the latest vacancies delivered straight to your inbox each Monday, and consultant positions each Friday.
