The Homestead Exemption reduces the taxable portion of your property assessment if you own your primary residence in Philadelphia. The deadline to apply for the homestead exemption is Dec. 1.The deadline for LOOP is now Sept. The stateset deadline to apply is Thursday. The Homestead Exemption reduces the taxable portion of your property's assessed value. There are no income limits. Apply for the Philadelphia Homestead Real Estate Tax Exemption to save money on your real estate taxes. The March 1 application deadline for property tax relief is set in the Homeowner Tax Relief Act (Section 341 of Act 72 of 2004). Residents can apply for the Homestead Exemption through a relatively simple, onepage form. The application is simple and takes only minutes to complete.