Ask who sends the most money into the developing world and most people will say governments, or the World Bank, or maybe a famous charity. All wrong. The biggest flow by far is nurses, drivers, builders and cleaners wiring part of their wages home.
Migrant workers sent an estimated $656 billion to low- and middle-income countries in 2023, according to the World Bank. Across every country in the world, remittances reached about $905 billion in 2024. Meanwhile, total foreign aid from the world's richest nations — the entire official development assistance budget of every OECD donor combined — came to $174.3 billion in 2025.
That makes money sent home by migrants roughly four times larger than all the world's foreign aid put together. And this isn't a recent fluke: remittances have exceeded official aid every single year since the mid-1990s, and overtook foreign direct investment too.
For comparison, the money flowing into developing countries:
- Remittances: ~$656 billion (2023)
- All foreign aid, every OECD donor: $174.3 billion (2025)
- Remittances worldwide, including rich countries: ~$905 billion (2024)
- Aid's change in 2025: down 23.1% — the largest annual fall ever recorded
That last line matters, because the gap is widening fast. In 2025 global aid suffered its steepest contraction in the history of official development assistance, dropping to levels last seen in 2015. Remittances, meanwhile, kept climbing.
For some countries this money isn't a supplement — it's the economy. Remittances are worth around 41% of GDP in Tonga and 39% in Tajikistan. It also arrives differently from aid: no conditions, no administration, no ministry deciding priorities. It lands directly in a family's hands, usually for school fees, medicine, food or a roof.
There's a cost, though. Sending $200 across a border still averages fees of over 6% — billions skimmed annually from the people who can least afford it, which is why cutting that cost is a formal UN target.
The next time someone talks about rich countries bankrolling the developing world, remember the biggest money transfer on Earth isn't charity or policy. It's people paying their own families back.