Taiwan Mortgage Interest Deduction 2027 Calculator
Taiwan homeowners can deduct mortgage interest on their self-occupied primary residence — up to NT$300,000 per year. Must be registered as primary household residence. Mutually exclusive with the rent deduction. Source: Income Tax Act Article 17.
Taiwan Mortgage Interest Deduction 2027 Rules
Self-occupied primary residence mortgage interest is deductible up to NT$300,000 per year. The deduction must be offset by interest income on bank deposits — you can only claim NET interest expense. Property must be registered to the filer or their direct dependent. Loans on rental, investment, or non-primary properties do not qualify. Source: Income Tax Act Article 17, Item 2.
Net Interest Rule — Must Offset Savings Interest
Critical detail: claim is (mortgage interest paid) − (interest income on savings/CD accounts in your name). If you paid NT$200,000 mortgage interest but earned NT$50,000 in savings interest, your deductible amount is NT$150,000 net. This applies even if savings are in a different bank. Plan to redirect savings to spouse/dependents if your bracket is high.
Mortgage Deduction vs Rent Deduction — Choose One
Households can claim mortgage interest OR rent — never both. Mortgage cap (NT$300,000) is 2.5× higher than rent cap (NT$120,000), so most homeowners choose mortgage. Exception: low-bracket workers with small mortgage interest ( Yes, refinancing to a new bank on the same property does not reset the deduction. The new loan inherits the original purpose. However, if you refinance and take cash out for non-housing purposes, the cash-out portion's interest is NOT deductible. Source: National Taxation Bureau guidance.Refinancing — Does the Deduction Continue?