When selling commercial housing, the purchaser and the selling unit shall sign the relevant maintenance fund payment agreement, and the purchaser shall pay the maintenance fund to the selling unit (developer) according to the proportion of 2-3% of the purchase price. The maintenance fund collected by the developer belongs to all owners and is not included in the residential sales income.

The standard of special maintenance funds is: high-rise (including multi-storey with elevator) 90 yuan/square meter, multi-storey (including villa) 50 yuan/square meter (the standard of housing maintenance funds in different places is linked to the economic level, and the specific charging standards are slightly different);

Housing maintenance fund = cost per square meter of construction area × proportion × area.

However, it should be noted that the specific standard of maintenance funds is determined by the local real estate administrative department, so the proportion of maintenance funds varies from region to region. It is recommended that buyers go to the website of the local government or the website of the Housing Authority.