JSMedia – Mortgage interest deductions are not deductible at all. In fact, these costs are not even deductible. Depending on your loan, you can get as little as 0.25% of your loan as a tax break. But it’s a complicated process. TurboTax has tools to help you deduct the appropriate amount of mortgage points. You can pay two discount points up front to lower your loan rate. But be aware that this money won’t go far in your refund.