Q4 is planning season: Review revenue and expenses now and decide which levers to pull before December 31 (another property, business vehicle, Solo 401(k), HSA, pre-tax 401(k)).
Deadlines: Individual 2025 extended returns are due October 15, so get any cost segregation study done in the next two weeks.
Accelerate or defer based on your year: If this year has big write-offs (cost seg, bonus depreciation) and next year will be lighter, defer expenses like HOA, accounting, and attorney fees into January and consider pulling income forward.
Prepay only when this year is the higher-income year: Deductions are most valuable in the year with income to absorb them.
House hacking works well: Record your move-in date, since depreciation on the personal-use portion stops then.
Furnish before you move in: Pay for furnishing and renovations beforehand so they're deductible as rental expenses.
Home sale exclusion: Prior residency still counts toward the two-of-five-years rule.
Short-term rental conversion: Furniture and items like a sauna qualify for 100% bonus depreciation for 2026 and later.
Cost seg is borderline under roughly $200K to $250K, and may not make sense if you plan to move back in, due to depreciation recapture.
STR qualification: You need at least two stays with an average under seven days, plus 100 hours of participation (spouses' hours combine).
What counts as hours: Hours count from when you're under contract. Furniture assembly, repairs, staging, and bookkeeping count. Travel from your primary home and tax strategy calls don't.
Documentation: Keep an hours tracker and a ledger. Bank, card, Venmo, and Zelle statements serve as the paper trail.
Interest: Mortgage and HELOC interest is deductible when used for the rental.
Passive losses: Losses from long-term rentals carry forward indefinitely.
Long-term outlook: You don't need to buy a property every year, so stay realistic about what you can manage.
Real estate professional status: If a household has no W-2 income, a spouse may qualify.
Trusts: Your attorney and title company handle moving properties into a trust.
First death: The deceased spouse's share generally gets a step-up in basis and typically needs its own EIN. Review the "upon first death" provision with an experienced real estate attorney.
Tools: Baseline is a recommended landlord bookkeeping app that tracks by property. Use a separate rental bank account.
Hiring family: Pay family members through a real payroll service like QuickBooks or Gusto to make the deduction legitimate.
General Mindset
Plan before year-end, not after.
Match deductions to income: Sometimes that means accelerating expenses, sometimes deferring.
Documentation is your protection: Ledgers, statements, and hour logs win audits.
Don't let the tax tail wag the dog: Never do something purely for the deduction.
Keep it simple and sustainable.
Use the right professional for each piece: CPA for tax, attorney for trusts and titles, specialists for cost seg.