There is no clean rule. The material participation tests in Treas. Reg. §1.469-5T measure your hours of participation in an activity, but neither those tests nor IRS Publication 925 states when a short-term rental activity begins, so the forty hours you spent assembling beds in October sit in genuinely unsettled ground. Many practitioners take the position that work done to open a short-term rental trade or business counts; others exclude everything before the first guest. The part you control is the record, and a log that separates pre-opening hours from operating hours lets your preparer take either position without rebuilding anything.
The long-term rental rule and the short-term rental argument
For a conventional rental, Treas. Reg. §1.469-1T(e)(3) treats the activity as a rental activity, and IRC §469 makes rental activities passive as a general matter regardless of how many hours the owner puts in. The question of whether pre-opening time counts rarely changes an outcome there, because the hours do not change the answer.
Short-term rentals are different because of the exception in §1.469-1T(e)(3)(ii)(A). When the average period of customer use for the year is seven days or less, the activity is not a rental activity at all. It is tested like any other trade or business, which is why hours suddenly matter and why owners start counting them.
That is also where the pre-opening argument comes from. If the activity is a trade or business, the work of opening it — furnishing, listing, licensing, setting up operations — looks like participation in that business rather than passive ownership of real estate. The counter-argument is that participation is measured in an activity, and an activity that is not yet operating cannot yet be participated in. The regulations do not resolve this directly for short-term rentals, and no post should tell you which way it goes. Treat pre-opening hours as a position your CPA takes, not as hours you can assume.
Placed in service means ready and available
The related concept owners already know from depreciation is "placed in service." IRS Publication 527 and Publication 946 describe property as placed in service when it is ready and available for its intended use. For a rental, that generally means furnished, licensed where required, listed and available to guests — not necessarily occupied. A property that sits empty for three weeks after the listing goes live is still in service.
Placed in service is a depreciation concept, not a §469 concept, so it does not settle the participation question by itself. It is still the most defensible marker available, because it is documented by the listing date, the insurance binder, the permit and the first booking window. Many preparers draw the line there: hours after the property was ready and available are ordinary operating hours, and hours before it are the block that needs a decision. The fall purchase post covers how that date interacts with a late closing.
Setup tasks that read as operational
These are the pre-opening tasks that most resemble running a business, and the ones worth logging with the most care:
- Assembling, installing and testing furniture, appliances, locks and safety equipment
- Shopping for and stocking linens, kitchen supplies and consumables
- Writing the listing, the house rules and the guest manual
- Photographing the property or directing a photographer
- Setting up pricing, calendar rules and the booking platform account
- Registering for a short-term rental permit, lodging tax account or HOA approval
- Interviewing, hiring and scheduling a cleaner, handyman or co-host
- Meeting inspectors, utility technicians and installers on site
Each is a specific task with a duration and, usually, a receipt, a message thread or an appointment behind it. That is what makes them worth logging whichever way the pre-opening question is decided.
Setup tasks that read as investing
Temp. Reg. §1.469-5T(f)(2)(ii) excludes work done in your capacity as an investor. It names studying and reviewing financial statements or reports on the operation, preparing or compiling analyses of the finances for your own use, and monitoring the finances in a non-managerial capacity. Time spent that way does not count as participation no matter when it happens.
In practice that covers most of what happens before a purchase closes: analyzing markets, running return projections, touring candidate properties, negotiating the contract, applying for financing and reviewing closing documents. Those hours belong to the investment decision rather than to the operation of the business. The guide to what counts as participation goes through the distinction in more detail, and it is the same line that applies to acquisition time in any year, not just the first one.
Bookkeeping sits in between, and it depends on what the work is for. Setting up a chart of accounts and a payment workflow so the business can operate is closer to operational; reviewing statements afterward to see how the investment performed is the named investor activity.
Log everything, label the pre-opening block
The record-keeping answer is the same under either position, which is what makes it easy.
Log every setup hour the way you would log a turnover in July: date, property, the specific task, actual minutes rather than rounded hours, and who did the work. Then mark the pre-opening entries so they can be separated later. In STR Tracker, the notes field on each entry is the simplest place for a label like "pre-opening," and it carries through as its own column in the year-end export, so a preparer can filter the block out or leave it in without touching the rest of the log.
Two things to watch. First, run your totals both ways before you assume you qualify. If the hours after the property was ready and available clear 100 on their own, the pre-opening question is academic for the 100-hour test and worth far less argument. If the pre-opening block is what carries the total, your CPA needs to know that before the return is filed, not after.
Second, the "more than any other individual" prong runs during setup too. Designers, contractors, installers and photographers can put in real hours in those same weeks, and their time counts against you in that comparison even if your own pre-opening hours are ultimately excluded from your side of it.
Start-up costs and cost segregation are a separate question
Pre-opening spending has its own rules that have nothing to do with hours. IRC §195 generally requires costs incurred before a business begins to be capitalized, with an election to deduct a limited amount in the first year and amortize the remainder. A cost segregation study, meanwhile, keys off the placed-in-service date, not the closing date or the date the work was done.
So the same calendar date shows up in three separate analyses — depreciation, start-up costs and participation — and they do not have to reach the same answer. Ask your CPA about them separately.
Your first 30 days, written down
- The closing date, the date the listing went live, and the date of the first check-in
- Every setup task with its date, minutes and a one-line description
- Who else worked on the property before opening, and roughly how long
- Receipts and invoices attached to the entries they relate to
- Photographs of completed work, which double as before-and-after corroboration
- The permit, insurance and platform confirmations that evidence "ready and available"
A first-year log that shows all of this is more useful than one that guesses which hours will survive. If you are opening a property now and want the pre-opening block captured as you go rather than reconstructed in March, start a log on day one and keep it running through the first season.