Airbnb & STR Year-End Tax Checklist: 10 Decisions Before Dec 31

General framework for year-end STR tax decisions. The call on which decisions fit your facts stays with you and your CPA.

What "year-end" means for an STR host

"Year-end tax planning" and "tax preparation" are not synonyms. Year-end runs October through December and is about decisions: what hours have you logged, what assets will be placed in service, where do personal-use days stand, what Q4 purchases get classified which way. Tax preparation runs January through April and is about documentation: pulling the 1099-K, reconciling bank deposits, grouping expenses onto Schedule E lines, assembling the CPA handoff. The two phases work in sequence; mixing them is where hosts lose.

Most of the year-end decisions have a hard Dec 31 deadline. A §280A personal-use day already logged on the calendar is already logged; you cannot undo it on April 14. A §168(k) placed-in-service date depends on the asset being "ready and available for its intended function" by December 31, not January 2. An hour of §469 (the passive activity loss rules) material participation requires that the work was actually done in the tax year, with contemporaneous documentation. Tax Court cases applying the Reg. §1.469-5T(f)(4) "any reasonable means" evidentiary standard have consistently rejected memory-based reconstructions assembled months later.

The practical implication: Q4 is the window where you still have agency. In January, the calendar has made most of these decisions for you. The 10 decisions below are the ones worth making before the calendar does.

The 10 year-end decisions, at a glance

Each row is a decision, a deadline, and a dollar-impact pointer. The sections after this table walk each one in detail.

Deadlines above are the federal-rule general case; your state and local rules may differ, and your CPA's filing calendar may compress the "return filing" category for decisions #7 and #10. Not tax advice.

1. Lock the §469 material-participation hours

If the STR loophole holds for this property this year, non-passive treatment of the rental loss depends on meeting one of the seven §1.469-5T(a) material-participation tests. The two hour-based tests get the most attention: (a)(1) is a solo more-than-500-hours threshold, and (a)(3) is a comparative more-than-100-hours-AND-not-less-than-any-other-individual test. By early December, you can calculate where you stand. If (a)(1) is in reach but short (say, 420 hours in early December), the remaining weeks of the year are the last window to log additional qualifying work. Hours cannot be retroactively invented: Reg. §1.469-5T(f)(4) permits "any reasonable means" of proof, but Tax Court cases applying that standard have consistently rejected memory-based reconstructions.

Spouse hours count under §469(h)(5) and Reg. §1.469-5T(f)(3) regardless of joint or separate filing, regardless of whether the spouse holds an ownership interest. If both spouses are participating, both should maintain separate contemporaneous logs so the aggregation is defensible on examination.

Dive deeper: the §469 material-participation hour self-audit workflow (the logged-hour worksheet, the investor-activity carve-outs under §1.469-5T(f)(2)(ii), and the four-outcome decision tree), 100-hour vs 500-hour test decision framework, what counts as material participation. How Field Ledger helps: the per-property MP-summary view surfaces hour totals with Reached / Below markers at each threshold, so December is a calendar check, not a retroactive rebuild.

2. Finalize bonus-depreciation and §179 placed-in-service decisions

100% first-year bonus depreciation under §168(k) is back permanently under OBBBA (P.L. 119-21, signed July 4, 2025) for qualifying property acquired AND placed in service after January 19, 2025. The pre-OBBBA phase-down (40% for 2025, 20% for 2026, 0% after) is superseded for post-cutoff property. IRS Notice 2026-11 (January 14, 2026) is the interim guidance. The §179 expensing cap also rose, to $2.5 million (phase-out at $4 million), permanent and inflation-indexed starting 2026.

"Placed in service" is the Dec 31 deadline that matters. The IRS standard is that the asset is "ready and available for a specifically assigned function" by year-end: furniture installed and the listing live, appliance plugged in and operational, land improvement completed and in use. Buying December 30 and leaving the item in the garage is not placed in service for 2026. Cost-segregation studies on the building portion of a purchase can carve out 5-, 7-, and 15-year components eligible for 100% in year one; the study itself can be done after year-end to recover the position for a property placed in service during the year.

Dive deeper: bonus depreciation 2025 for STR hosts under OBBBA, cost segregation + STR loophole, Airbnb depreciation guide. How Field Ledger helps: the Schedule E CSV export separates capital items with suggested MACRS class life so your CPA can review placed-in-service and bonus-depreciation treatment on a line-grouped record.

3. Audit §280A personal-use days before Dec 31

§280A (the dwelling-unit personal-use limits) kicks in when total personal-use days exceed the greater of 14 days OR 10% of the days the property was rented at fair rental during the year. Cross that threshold and the property is a "residence" under §280A(d) for the year: deductions are capped at gross rental income (no loss allowed), expense allocations shift to a §280A-specific formula, and the §469 STR-loophole analysis is complicated by the §280A override.

Personal-use days include days you or family members used the property for personal purposes, days rented at less than fair rental, and days exchanged under a reciprocal use arrangement. A day of maintenance or repair work on which the property was not rented and no personal use occurred is excluded under §280A(d)(2) if the principal purpose of the day was "substantially full time" on repairs or maintenance; the regulation calls this out specifically. Document those repair-day characterizations contemporaneously; a Tuesday afternoon of leisure plus two hours of light cleaning does not qualify, and reconstructing the characterization in April loses the day.

Dive deeper: personal-use days log template. How Field Ledger helps: personal-use days are logged against the §280A(d) threshold (14 days OR 10% of fair-rental days) with a four-state status readout (within / approaching / over / no-data); repair days are categorized separately with the underlying activity record so your CPA can evaluate the "substantially full time" characterization on documented facts.

4. Classify Q4 purchases: capital vs. repair vs. de minimis

Three categories cover almost every Q4 outlay. Capital expenditures (replacing the roof, major renovation, a new HVAC unit) are added to basis and depreciated. Repairs and maintenance (fixing a leak, patching drywall, servicing the furnace) are deducted in the year incurred under Reg. §1.263(a)-3. De minimis items under the §1.263(a)-1(f) safe harbor ($2,500 or less per invoice, with an elected book-conformity policy and the election made on a timely-filed return) are expensed in year rather than capitalized.

The decision happens in December because the categorization affects what hits Schedule E vs. Form 4562, and the de minimis election is annual (it must be made on the current-year return; a January reclassification cannot elect what December did not). Keep invoices with the full breakdown: a single $4,000 appliance invoice is above the $2,500 safe harbor; two $2,000 appliance invoices for separately placed-in-service items may qualify under the per-invoice test. Your CPA's call, with the underlying documentation available.

Dive deeper: Airbnb depreciation guide (capitalize vs. expense). How Field Ledger helps: expense entries capture per-item invoice amounts and carry a de minimis flag at or below the $2,500 threshold; the Schedule E export groups capital items separately with a suggested MACRS class life so your CPA reviews rather than reconstructs.

5. Confirm the 7-day average-stay still holds

The STR-loophole stack has two prongs: the §1.469-1T(e)(3)(ii)(A) 7-day-average-stay test takes the property out of the §469(c)(2) per-se passive rental class, and a §1.469-5T(a) material-participation test keeps the resulting loss non-passive. The 7-day test is annual and per-property: the average period of customer use for the year must be 7 days or less. Calculating "average period of customer use" means dividing the total rental days by the total number of distinct guest stays (reservations), not by nights-of-the-week or occupancy percentage.

A property that averaged 5 days per stay through October can slip above 7 by December if a stretch of long-stay bookings runs late in the year (a holiday-week guest for 10 nights, a slow-season monthly stay). Pull the per-reservation stay data by mid-December and run the arithmetic. If you're sitting at an average of 7.1 nights with three remaining bookings on the calendar, those three bookings' durations can move the yearly average above or below the line. The second STR-exception path under §1.469-1T(e)(3)(ii)(B) (average stay 30 days or less with significant personal services) is a different analysis typically outside hobbyist STR scope.

Dive deeper: the 7-day rule and the STR tax loophole. How Field Ledger helps: guest-stay entries drive the per-property average-period-of-customer-use calculation with a status readout (Under 7d / Under 30d / Over) against the §1.469-1T thresholds.

6. Document stated business purpose for every mileage trip

§274(d) requires contemporaneous substantiation for travel, entertainment, gift, and listed-property deductions: amount, time, place, and business purpose. For STR hosts, that applies to mileage, auto expenses, and any business travel to the property or related errands. A log that shows date and odometer reading but no stated business purpose fails §274(d) regardless of how many trips it captures. "Site visit" without a specific reason (meeting the cleaner, taking receipt of a repair contractor, picking up supplies for the Nov 3 turnover) is thin on examination.

December is the window to catch missing-purpose entries. Pull the full-year mileage log, scan for trips without a specific purpose line, and reconstruct from anchor evidence while the memory is still fresh: calendar entries, cleaner communications, hardware-store receipts, Airbnb message timestamps. Travel to the property on days you were otherwise there for personal use is typically disallowed as commute-adjacent regardless of substantiation, and travel hours generally should not be auto-counted toward §469 material-participation hours (consult your CPA; this is a position Field Ledger takes as a taxpayer-safe default).

Dive deeper: how to track Airbnb mileage for taxes, does drive time count as material participation. How Field Ledger helps: mileage entries without a stated business purpose are flagged as lacking a stated purpose and excluded from the standard-mileage-rate figure rather than silently counted. Travel hours are captured but never auto-counted toward MP totals.

7. Consider §1.469-4 grouping-election readiness (with your CPA)

Multi-property STR hosts face a per-property vs. grouped-activity choice. By default under §1.469-4, each rental is a separate activity; material participation is tested per property, and a disposition of one property doesn't release suspended passive losses from another. A §1.469-4 grouping election treats grouped activities as one activity for §469 purposes: hours aggregate across the group for the material-participation tests, but a disposition of any single property within the group doesn't trigger the full-loss release that a complete-disposition of a single activity would otherwise produce under §469(g).

The election itself is made on a timely-filed return (including extensions), so December doesn't force the final decision. What December does force is the record: aggregated hour totals per property, average-stay per property, operating-economic-unit documentation (shared management, shared financing, geographic proximity). Your CPA reviews that record and makes the grouping call for the multi-year context, since the election has consequences that outlast the single tax year.

Dive deeper: multi-property STR record-keeping, how to prove material participation to the IRS. How Field Ledger helps: per-property views stay separate (so grouping is an election applied downstream, not a tool-side assumption); CSV exports preserve per-property identifiers your CPA uses to run the grouping-or-not analysis on a defensible underlying record.

8. Check 2026 MAGI against the §469(i) $25k allowance

The §469(i) $25,000 allowance is defined for "rental real estate activities" per §469(i)(6)(A). An STR that qualifies under the §1.469-1T(e)(3)(ii)(A) 7-day exception is removed from rental-activity status and treated as a trade or business, so §469(i) does NOT reach it: if the 7-day test holds but material participation fails, the resulting loss is a passive trade-or-business loss, not a passive rental loss, and the $25k allowance does not apply. §469(i) applies only in the branch where the 7-day test itself fails and the property is treated as a §469(c)(2) rental for the year. In that branch, up to $25,000 of passive rental loss offsets non-passive income for taxpayers who actively participate (a lower bar than material participation: making management decisions, approving tenants, approving expenditures), subject to a MAGI phase-out: full $25k if MAGI is $100,000 or less; phased down by $0.50 per $1 of MAGI above $100,000; fully phased out at MAGI of $150,000.

December is the window where MAGI is estimable but not yet final; a late-year Roth conversion, bonus, or IRA deduction can move you across the phase-out line. A MAGI near $130k delivers a $10k allowance (60% phased out, not half; half ($12.5k) lands near $125k). Modeling the delta is a CPA conversation worth having before year-end rather than discovering the shortfall at filing.

Dive deeper: short-term rental passive activity loss, long-term rental losses and your W-2 salary. How Field Ledger helps: the Schedule E CSV export carries per-property line-grouped totals your CPA can plug into the §469(i) analysis once your 2026 MAGI estimate is in hand.

9. Audit state occupancy-tax and local-filing deadlines

State and local filing cadences for STR hosts rarely match the federal April 15 deadline. State occupancy, lodging, or transient-rental taxes typically file monthly or quarterly; many state and city STR permits renew annually with December or January deadlines; several states still have 1099-K reporting thresholds lower than the restored $20,000-and-200-transactions federal threshold (MA, VT, VA, MD, DC). Property-tax personal-property declarations for furniture and appliances inside the rental are a January deadline in several jurisdictions.

The December action is an audit of your state-and-local calendar: list every filing your STR triggers, confirm its deadline, confirm the amount collected matches the amount paid, flag any permit expiring at year-end that requires a December renewal. Field Ledger does not file state returns; this one lives in your or your CPA's calendar.

Related: Airbnb and Vrbo typically collect state occupancy tax on your behalf in many jurisdictions but not all; verify at the state-and-city level that collection and remittance happens through the platform or whether you file directly. Your state's department of revenue is the authoritative source.

10. Set up the January CPA handoff

The year-end decision list closes with the January handoff. By Dec 31, you want your CPA to have: a cover note describing anything unusual this year (property sold or converted, cost-seg study commissioned, §1.469-4 grouping consideration, §280A reclassification exposure), a calendar date for the handoff meeting (first or second week of January is common), and a readiness check on the records that will flow in: 1099-K download date (early January), year-end mileage log total, per-property material-participation hour summary, per-property personal-use day count, per-property average-stay figure, Schedule E expense groupings, capital-asset list with placed-in-service dates.

The handoff is a January activity; the readiness check is December. A CPA facing a mid-January handoff with no advance context has to triage; a CPA with a December heads-up on where the complexity lives can plan the engagement. For hosts without a CPA relationship yet, December is the window to retain one for the 2026 filing (February is late; March is often full).

Dive deeper: Airbnb tax preparation checklist (Jan–Apr window), how to prove material participation to the IRS. How Field Ledger helps: the Schedule E CSV export is per-property, line-grouped to Schedule E categories, with capital items listed separately plus suggested MACRS class life and de minimis flags; your CPA reviews rather than reconstructs.

Frequently asked questions

Related guides

• Airbnb tax preparation checklist: the January-through-April documentation sequel to this decision anchor.
• Bonus depreciation 2025 for STR hosts under OBBBA: the deep dive on decision #2.
• Cost segregation + STR loophole: the stacking strategy that makes bonus depreciation count against W-2 income.
• 100-hour vs 500-hour material-participation test: the decision framework behind decision #1.
• What counts as material participation for a short-term rental: the qualifying-activity primer.
• Personal-use days log template: the §280A(d) daily-log pattern behind decision #3.
• The 7-day rule and the STR tax loophole: the average-stay deadline behind decision #5.
• How to prove material participation to the IRS: the audit-file structure behind decisions #7 and #10.
• Airbnb depreciation guide: the capitalize-vs-expense framework behind decision #4.
• The reconstruction problem: why December-not-April is the right window for most of these decisions.
• Short-term rental passive activity loss: the §469(i) $25k allowance context for decision #8.

Statutory sources

• IRC §469: passive activity loss rules, including §469(c)(2) per-se rental-activity treatment, §469(c)(7) real-estate-professional qualification, §469(h)(5) spouse aggregation, and §469(i) $25,000 active-participation allowance with MAGI phase-out.
• IRC §280A: personal-use / mixed-use residence rules, including the §280A(d)(1) 14-day-or-10% ceiling and the §280A(d)(2) exceptions for repair-and-maintenance days performed substantially full time.
• IRC §274(d): substantiation requirements for travel, meals, gifts, and listed property (including vehicles): amount, time, place, and business purpose contemporaneously recorded.
• IRC §179: election to expense certain depreciable business assets. OBBBA raised the cap to $2.5 million and the phase-out threshold to $4 million, permanent and inflation-indexed starting 2026.
• IRC §168(k): accelerated / bonus depreciation. OBBBA (P.L. 119-21, July 2025) restored 100% first-year bonus depreciation permanently for qualifying property acquired AND placed in service after January 19, 2025.
• Reg. §1.469-1T(e)(3)(ii)(A) and (B): STR-exception rules; the 7-day-average-stay test and the 30-day-with-significant-personal-services test that each remove a property from the "rental activity" class.
• Reg. §1.469-4: definition of activity, including grouping rules and the consequences of grouping on disposition.
• Reg. §1.469-5T: material-participation tests, the Reg. §1.469-5T(f)(4) "any reasonable means" standard for participation records, Reg. §1.469-5T(f)(2)(ii) investor-activity exclusion, and Reg. §1.469-5T(f)(3) spouse aggregation implementing §469(h)(5).
• Treas. Reg. §1.263(a)-1(f): de minimis safe harbor for capitalization ($2,500 or less per invoice; book-conformity policy; annual election on timely-filed return).
• IRC §461(l): excess business loss limitation for non-corporate taxpayers; threshold is inflation-indexed annually. OBBBA made the limitation permanent and reset the inflation base.
• IRS Publication 925: Passive Activity and At-Risk Rules.
• IRS FS-2025-08 and IR-2025-107 (OBBBA provisions overview): 1099-K threshold restoration to $20,000 AND more than 200 transactions.
• IRS Notice 2026-11 (January 14, 2026): interim guidance on OBBBA §168(k) bonus depreciation (available on irs.gov/pub/irs-drop).
• Rev. Proc. 2025-32: 2026 inflation adjustments, including the §461(l) excess business loss thresholds ($256,000 single / $512,000 joint for 2026).

General information about U.S. federal tax rules; not tax advice. Consult a qualified tax professional on which decisions apply to your specific facts.

The key takeaway

The year-end window is small. December 31 is a hard cutoff for most of the 10 decisions above, and the records that justify them cannot be rebuilt in April. The decisions span three axes: §469 (material-participation hours and grouping-election readiness), §280A (personal-use ceiling and repair-day characterization), and §168(k) with §179 (placed-in-service dates and de minimis classification). Any decision you push to filing season is a decision made for you by the calendar. Not tax advice; material participation, placed-in-service status, §280A reclassification, and §1.469-4 grouping are all fact-specific IRS determinations, and the call stays with you and your CPA.