Claiming bonus depreciation and cost segregation deductions on a short-term rental can produce significant tax savings — but those deductions come with documentation requirements. The IRS may request substantiation for large depreciation claims, and gaps in your records can result in disallowed deductions, penalties, and interest. This checklist covers the records STR hosts should keep when claiming accelerated depreciation.

This article describes general recordkeeping practices for educational purposes only. Specific documentation requirements depend on your situation. Work with a licensed CPA and, where applicable, a qualified cost segregation firm.

Why Documentation Matters More for STR Depreciation

Ordinary rental depreciation over 27.5 years is straightforward to document — purchase price, land allocation, and placed-in-service date. Bonus depreciation and cost segregation raise the stakes because:

Large year-one deductions attract scrutiny. A $200,000 depreciation deduction in year one is more likely to be reviewed than $7,000/year over 27.5 years.
Component-level classification requires an engineering basis. Reclassifying personal property and land improvements requires a qualified study — not a spreadsheet estimate.
Material participation claims must be contemporaneous. The IRS requires that participation hours be documented at the time of the activity, not reconstructed from memory later.
The statute of limitations is generally 3 years from filing (6 years if income is understated by more than 25%). Keep records for at least that long — and longer for depreciation, which recaptures across the full holding period.

Acquisition Records

Retain all documents related to the purchase of the property:

Closing disclosure (HUD-1 or CD) — The primary source for purchase price, closing costs, prorations, and other capitalized amounts.
Settlement statement and title policy — Confirms ownership transfer date (your placed-in-service date).
Land vs. improvement allocation — Document how you allocated purchase price between land (not depreciable) and depreciable improvements. Common methods: county tax assessor assessed value ratio, appraisal, or cost segregation study. Keep whichever you use.
Appraisal (if obtained) — Useful to support both the purchase price and any land/improvement split.

Cost Segregation Study

If you claimed bonus depreciation on reclassified components, a cost segregation study prepared by a qualified engineer or firm is the foundational document. Retain:

The full cost segregation report (not just the summary page)
The engineer or firm's qualifications and methodology description
Supporting schedules showing component-level allocations and depreciation lives
Any site visit notes, photographs, or architectural plans referenced in the study
Invoices from the cost segregation firm

A study prepared by an unqualified party — or a self-prepared allocation without engineering support — is unlikely to withstand IRS scrutiny.

Capital Improvements and Personal Property

Bonus depreciation applies to new property you acquire in addition to the building — furnishings, appliances, fixtures, and equipment placed in service for the rental. Keep:

Receipts and invoices for all furnishings, appliances, electronics, and equipment — with vendor, date, and amount.
Delivery or installation confirmation establishing when items were placed in service.
A fixed asset schedule(a spreadsheet or your CPA's depreciation schedule) listing each item, cost, category (5-year, 7-year, 15-year, or 27.5-year), placed-in-service date, and bonus depreciation amount claimed.
Renovation contracts and invoices if you renovated before renting — including contractor bids, signed contracts, progress payments, and final invoices.

Placed-in-Service Date

Bonus depreciation is available for property placed in service during the tax year — meaning ready and available for rental use. Document the placed-in-service date with:

First listing date on Airbnb, Vrbo, or your platform of choice (screenshots with timestamps)
First booking confirmation
Utility activation dates
Final inspection or certificate of occupancy (if a new build or major renovation)

For the OBBBA 100% bonus track, property must have been acquired after January 19, 2025. The closing date on your settlement statement documents this. See the OBBBA bonus depreciation article for more on the acquisition date requirement.

Material Participation Records

To deduct STR losses against ordinary income under the STR exception or Real Estate Professional Status, you must meet specific participation thresholds. The IRS requires that these hours be documented contemporaneously — a log maintained throughout the year, not reconstructed at tax time.

Your participation log should record:

Date of each activity
Nature of the activity (guest communication, cleaning coordination, maintenance, bookkeeping)
Time spent (start and end time, or total hours)
Property the activity relates to

Acceptable documentation formats include a written log, a spreadsheet, calendar entries, or a time-tracking app — as long as entries are made at the time of the activity. Email timestamps, platform message logs, and booking records serve as corroborating evidence.

The STR exception (average stay ≤7 days, >100 hours of participation, more than any other individual) and the 750-hour REPS threshold both require your participation to be documented contemporaneously. Reconstructed logs are a common IRS challenge point.

Rental Activity Records

Keep records supporting gross rental income and expenses:

Platform payout statements (Airbnb, Vrbo, or direct booking records) for all years
Form 1099-K if received
Receipts for operating expenses: cleaning, supplies, repairs, utilities, insurance, property management fees, platform fees, HOA dues
Mortgage statements showing interest paid (Form 1098)
Property tax payment confirmations
Insurance premium invoices

How Long to Keep Records

General rule: 3 years from the date the return was filed (or due date, whichever is later).
If income was understated by >25%: 6 years.
Depreciation records: For as long as you own the property plus the applicable statute of limitations after you sell. Depreciation recapture at sale is calculated on all depreciation claimed during the holding period — you need the full depreciation schedule from year one.
Cost segregation study: Permanently. The study supports the original classification and is needed to calculate gain on disposition of individual components.

Model Your Depreciation in the Calculator

The STR Benefit Calculator lets you enter cost segregation allocations and see the resulting depreciation schedule and estimated tax savings across multiple years. Use it to understand the magnitude of deductions you may claim — which in turn helps you gauge the level of documentation those deductions will require. Explore the full blog for more on bonus depreciation, material participation, and high-income STR tax planning.

This article is educational and does not constitute tax, legal, or financial advice. Recordkeeping requirements depend on individual facts, filing positions, and applicable law. Consult a licensed CPA or tax attorney for guidance specific to your situation.

STR Depreciation Records: What to Keep When Claiming Bonus Depreciation and Cost Segregation