How Reliable Are STR Property Yield Projections?

In STR investment proposals, high yields are often emphasized. However, what investors should really examine is which layer of profit the figure refers to, and what costs are actually included. If it is unclear whether the number refers to gross revenue, profit after operating expenses, or final cash remaining after taxes and debt service, meaningful comparison between opportunities becomes impossible.

The challenge is that this understanding is not always consistent across brokers and market participants, and in many cases the underlying assumptions are not sufficiently organized. For that reason, this article lays out, in practical terms, the key items investors should review when assessing yield projections for STR assets.

The chart below illustrates, in simplified form, how revenue is reduced step by step until the final cash remaining is reached.

Before Looking at Yield, Separate the Different Layers of Profit

When reviewing an operator or broker’s projection, the first question should be whether the stated yield is based on revenue, or on profit after costs. What investors ultimately care about, however, is how much cash flow remains at the end. That is why STR underwriting should be viewed not only through gross or net yield, but through a cash-flow lens that also takes taxes into account.

The Core Cost Structure We Use When Assessing STR Operations

From our perspective as an operator, STR cost structures should be reviewed in detail and in full. Compared with conventional residential leasing, STR operations involve more line items, and many of them appear small in isolation but materially affect the final cash remaining when accumulated over time.

How Revenue Should Be Defined

Before discussing costs, the first issue to clarify is how revenue is defined. Smaller operators sometimes treat the amount received after Airbnb deducts its platform fee as revenue. In practice, however, revenue should generally be defined as the total amount paid by the guest, including OTA fees and cleaning charges. For direct bookings, the starting point should likewise include the full guest payment amount, including the payment-processing component.

A consistent revenue definition is a prerequisite for any meaningful yield analysis. If the top line is defined incorrectly, every calculation that follows will also be distorted.

Fixed Costs That Should Be Included

Fixed costs are expenses that continue to arise even when occupancy falls. They may look granular, but once accumulated they become meaningful enough to alter the investment case.

Among these, the most important items are often internal personnel cost and repair / replacement cost. Many projections still fail to reflect them adequately.

Repair costs are frequently overlooked because they do not occur in the same amount every month. But the fact that they are irregular does not make them optional. Air conditioners, water heaters, bedding, furniture, and appliances all deteriorate and eventually require replacement. In practice, it is better to assume a monthly reserve for such expenditures from the outset.

Internal personnel costs are also often treated as if they were free. In reality, depending on the scope of outsourced management, a meaningful portion of work may remain with the owner. That means underwriting should always reflect the actual operational burden retained by the investor or sponsor.

Financing is not always easy to obtain for foreign investors in Japan, but where debt is used, interest expense is unavoidable. In those cases, it should be treated as part of the fixed cost structure.

Variable Costs That Should Be Included

Variable costs fluctuate with revenue, occupancy, guest count, and turnover frequency. In STR, two properties with the same revenue can have very different cost profiles depending on guest mix and average length of stay.

Cleaning and linen costs deserve particular attention. They should not be modeled simply as a percentage of revenue. STR operating costs depend not only on how many nights are sold, but on how many check-outs occur and how many guests stay in the property. Even a high-rate, high-occupancy property can see margins eroded more than expected if stay durations are short.

It Is Often the Overlooked Costs and Taxes That Determine Whether a Yield Projection Is Credible

The biggest gap in STR investment materials usually lies not in the visible expenses, but in how fully the less visible ones are incorporated. Taxes in particular are often treated too lightly, even though they meaningfully affect actual cash remaining.

Net yield figures are generally presented before these taxes are deducted. Investors therefore need to understand that such figures are not the same as the cash flow ultimately retained at the ownership level.

Property Tax and City Planning Tax

Property tax is an ownership cost that applies regardless of whether the STR performs well or poorly. While there may be tax treatment differences when a property is used as a residence, that assumption may change once it is treated as accommodation use. In central Tokyo locations, annual property tax can approach JPY 1 million, and overlooking that burden can materially distort the expected cash remaining.

Consumption Tax and Accommodation Tax

Accommodation revenue includes 10% consumption tax. As a result, the gap between output tax collected and input tax paid must be settled as part of tax filing. In other words, a portion of what appears to be revenue is not cash the owner ultimately keeps.

Accommodation tax is not imposed uniformly across Japan, but is introduced on a municipality-by-municipality basis. In Tokyo, for example, accommodation tax applies to stays at hotels and ryokan at JPY 100 per person per night for room charges between JPY 10,000 and JPY 15,000, and JPY 200 per person per night for charges of JPY 15,000 or more. The direct financial impact may not be large, but under dynamic pricing models the administrative burden of calculation and remittance becomes a practical issue in itself.

Corporate Tax

Once final profit is determined, corporate tax is imposed, taking into account aggregation with the company’s other profits where applicable. As a practical rule of thumb, it is reasonable to assume that corporate tax will amount to roughly 30% of operating profit when assessing the post-tax outcome at the project level.

Our View

In our view, what deserves investor trust is not the highest yield, but the most explainable yield. If a projection still holds after fully incorporating real operating costs, taxes, and repair reserves, then it is far more likely to deserve serious investment consideration.

By contrast, even when headline profitability looks strong, a projection is far less reliable if property tax, accommodation tax, consumption tax, average repairs, personnel cost, and post-debt cash remaining are left vague or omitted altogether. STR is an asset class where operational capability can enhance returns, but it is also one where yields can look materially different depending on how assumptions are framed.

That is why investors should focus not only on how high the projected yield appears, but on whether the model clearly explains every cost layer behind it.