https://en.wikipedia.org/wiki/London_Agreement_on_German_Ext...
"Under the London Debts Agreement of 1953, the repayable amount was reduced by 50% to about 15 billion marks and stretched out over 30 years, and compared to the fast-growing German economy were of minor impact.[2]
An important term of the agreement was that repayments were only due while West Germany ran a trade surplus, and that repayments were limited to 3% of export earnings. This gave Germany’s creditors a powerful incentive to import German goods, assisting reconstruction.[3]
The agreement significantly contributed to the growth of the post-war German economy and reemergence of Germany as a world economic power. It allowed Germany to enter international economic institutions such as the World Bank, International Monetary Fund and World Trade Organization."