Scheme to be extended across the country after trial in nine departments led to extra €10m in tax receipts

French tax authorities using AI software have found thousands of undeclared private swimming pools, landing the owners with bills totalling about €10m.

The system, developed by Google and Capgemini, can identify pools on aerial images and cross-checks them with land registry databases. Launched as an experiment a year ago in nine French departments, it has uncovered 20,356 pools, the tax office said on Monday, and will be extended across the country.