A deduction is a subtraction you can claim on your federal taxes that reduces your tax burden. There are a number of tax deductions that you can take advantage of if you refinance a mortgage loan. You can deduct the full amount of interest you pay on your loan in the last year if you did a standard refinance on a primary or secondary residence. You can only deduct 100% of your interest if you take a cash-out refinance, particularly if you use the money for a capital home improvement. Otherwise, you can only deduct the percentage of interest you paid on your original loan balance. You can also deduct your discount points and any closing costs you pay toward a refinance on an investment property. You must spread these costs over the total term of your refinance and can only deduct these expenses if you itemize your deductions.

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