A:

Any points you or the seller pay for your home loan are deductible for that year. Property taxes and interest are deductible every year. For sellers, commissions are a write off.

But while other home-buying costs (closing costs in particular) are not immediately tax-deductible, they can be figured into the adjusted cost basis of your home when you go to sell (any significant home improvements also can be calculated into your basis). These fees would include title insurance, loan-application fee, credit report, appraisal fee, service fee, settlement or closing fees, bank attorney’s fee, attorney’s fee, document preparation fee and recording fees.

The mortgage interest deduction entitles you to completely deduct the interest on your home loan for the year in which you paid it. You must itemize deductions in order to do this, which means your total deductions must exceed the IRS’s standard deduction.
Another point to remember is that the amount of interest on your loan goes down each year you pay on your mortgage (all standard home-loan formulas pay off interest first before significantly paying into principal). That’s why paying extra on your principal every year can help you pay off your loan early.