Homeowners should typically plan on spending between 1 and 3 percent of a home's purchase price on regular annual repairs and maintenance. On a $300,000 home, set aside at least $3,000 annually, or $250 from your monthly income, for ongoing home repair in addition to mortgage and property tax payments.Many purchasers also choose to make repairs when first buying a home.stimating how much money to save each month depends on what repairs you'd like to complete after purchasing the home, required repairs you expected to perform in the near future, and the average annual maintenance and repair bills based on the home's age and upkeep.