Depreciation is one of the most powerful tax benefits in real estate — and it significantly improves effective ROI. The IRS allows residential rental property to be depreciated over 27.5 years on a straight-line basis (the building value only, not land). On a $300,000 property with $240,000 allocated to the structure, that's $8,727/year in paper losses that offset your rental income — potentially eliminating your tax liability on cash flow entirely. For investors with adjusted gross income under $100,000, up to $25,000 of passive losses can offset ordinary income annually. This calculator shows pre-tax ROI — your after-tax return will be meaningfully higher once depreciation is factored in. Consult a CPA for your specific situation.