Apartment Leasing Seasonality: Why the Month You Buy Changes the Numbers
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Most people move when the weather is good and the school year allows it. In many markets, that means more leasing activity from spring through summer and less in the winter months. The pattern is not the same everywhere, and it can be weak in some markets, but it can distort a deal if you read one slice of the year as if it were the whole year. This post shows how to underwrite for it. It is part of our underwriting guides. It is general information, not investment advice.
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What changes through the year
| Item | Busy season tends to show | Slow season tends to show |
|---|---|---|
| Move ins | More | Fewer |
| Asking rents | Firmer | Softer, sometimes with concessions |
| Days a unit sits vacant | Fewer | More |
| Renewals | Easier to time | Harder to time |
Whether this holds in your market is something to test with data, not assume.
How seasonality can mislead you
- T3 annualized. If you annualize three strong summer months, you overstate the year. If you annualize three winter months, you understate it. See T3 annualized vs T12.
- A purchase date. Closing in a slow month may start you at lower occupancy than your annual average, which affects early cash flow and the first investor distribution.
- Rent growth. Rent changes at renewal, and asking rent changes on new leases. Seasonal discounting can look like a market decline when it is a normal cycle. See net effective rent and concessions.
How to underwrite for it
- Use monthly history. Ask for 24 months of occupancy, move ins, move outs and concessions from the property manager.
- Compare like months. January this year against January last year. Then check if a gap is seasonal or real.
- Model the lease expiration schedule. List lease end dates by month from the rent roll. A cluster in the slow season raises vacancy risk. See the rent roll and T12.
- Plan renewals. Offer renewal terms that move some expirations to better months. See lease renewal strategy.
- Keep reserves for the dip. A building can run lean in the slow months even when the year is fine. See reserves.
A hypothetical example
This is an illustration with made up numbers, not a market forecast. A 100 unit building has 40 leases ending in December and January. If renewals come in at the usual rate, the building may hold. If they run short, the building could carry a dozen or more vacant units into the slowest months, with no way to relet them quickly. Moving some of those leases to expire in May or June costs a small rent trade today and protects occupancy later.
Questions to ask the manager
- What did occupancy do month by month over the last two years?
- When do most leases expire, and can that be spread out?
- Do you run concessions in the slow season, and how are they recorded?
- How will you handle closing in this particular month?
How DoorRaise fits in
DoorRaise handles the raise, the deal company, the investor paperwork and escrow. Underwriting and operations stay with the sponsor and the property manager. Sponsors pay a flat $1,500 setup fee and a flat $5,000 yearly administration fee, and distributions are quarterly by default.
Frequently asked questions
Does seasonality matter everywhere?
Not equally. Some markets have strong seasons, others barely any. Check monthly data for the actual building and submarket.
Should I underwrite lower occupancy for the winter?
Model the year month by month, so the annual result reflects the pattern instead of assuming one flat number.
Can a sponsor just avoid closing in winter?
Sometimes. Closing dates depend on the seller, the lender and the contract. Plan for the occupancy you will actually have at closing.
Sources
- U.S. Census Bureau, Housing Vacancies and Homeownership (CPS/HVS)
- U.S. Census Bureau, Building Permits Survey
This article is general information as of November 2026, not legal, tax or investment advice. Every investment can lose money. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.