Net Yield Calculator: Formula and Worked Example
1. Short answer
Net initial yield is annual rent minus operating costs, divided by the total investment. It is gross yield after deducting what the property costs you to own each year.
Net yield = ((annual rent − operating costs) ÷ total investment) × 100%
The same apartment that shows a 5.37% gross yield comes out at 3.36% net once € 6,626 of annual costs are deducted. That two-point gap is exactly what the property costs, and it is why gross yield alone is not enough.
2. What net yield is, and what it is not
Net yield measures the return from operating the property: what it produces after fixed costs, but before financing and tax.
What it does include: maintenance, insurance, management, service charges, local taxes, vacancy allowance and letting costs.
What it does not include:
- no interest or repayment: net yield describes the property, not your loan
- no income or corporation tax
- no capital growth
- no one-off acquisition costs (those are already in the denominator)
Leaving financing out is deliberate: it keeps the figure comparable between two buyers with different loans. To know what actually reaches your bank account, you need cash flow and cash-on-cash return.
If you meet the term ROI in a rental context, it refers to this same metric. In the BRIX Calc rental calculator, ROI is a documented alias of net yield: same numerator, same denominator, same number. That is why there is no separate ROI card sitting next to net yield, which would put one result on your screen twice. In the transformation calculator ROI means something genuinely different: there it is project profit against project cost, over the whole holding period rather than per year.
3. The formula, component by component
Numerator: net rental income. Annual rent minus annual operating costs. The items most often forgotten:
- Vacancy allowance. Even a well-let property is empty occasionally. Use a percentage of annual rent (2–5% is common), not zero.
- Service charges. For an apartment, often the largest fixed cost after maintenance.
- Management. Even if you do it yourself: your time is a cost, and a buyer will price it in.
- Letting costs. Agent fees on tenant turnover, spread over the expected tenancy.
The rent you collect is not the rent you ask. This is the sharpest difference from gross yield, which runs on contracted rent. Net yield runs on what actually arrives, and two separate deductions stand between the two:
effective monthly rent = base rent × (1 − void %) × (1 − bad debt %)
A void is rent you miss because the unit is empty. Bad debt is rent you miss while a tenant is in place and not paying. Because they apply in sequence rather than in parallel, collapsing them into a single percentage almost always flatters the result.
Denominator: total investment. Identical to gross yield: purchase price plus transfer tax, acquisition costs and initial works. The same trap applies: using the purchase price alone inflates the result.
4. Worked example
The same apartment as in the gross yield example: 75 m², mid-sized city, bought in 2026 for € 285,000 with € 44,740 of acquisition costs, let at € 1,475 a month.
| Item | Per year |
|---|---|
| Contracted rent | € 17,700 |
| Void allowance (3%) | − € 531 |
| Collected rent | € 17,169 |
| Maintenance (1% of purchase price) | − € 2,850 |
| Service charges | − € 1,560 |
| Insurance | − € 320 |
| Local taxes | − € 480 |
| Management (5% of contracted rent) | − € 885 |
| Net rental income (NOI) | € 11,074 |
| Total investment | € 329,740 |
Net yield = (11,074 ÷ 329,740) × 100% = 3.36%
| Metric | Value | What it means |
|---|---|---|
| Gross yield | 5.37% | What the property produces before costs |
| Net yield | 3.36% | What remains after fixed costs |
| Difference | 2.01 points | The cost of ownership, over a third of the rent |
That last line is the point. Of every hundred euros you collect, roughly thirty-six go to keeping the property running, before a cent of interest is paid.
5. What counts as a good net yield?
As rough guidance for Dutch residential investments in 2026:
| Range | What it usually signals |
|---|---|
| below 3% | You are buying capital growth almost exclusively; operations barely carry themselves |
| 3% – 4.5% | Typical for open-market residential |
| 4.5% – 6% | Good; often outside the main conurbation or with self-management |
| above 6% | Check the assumptions: are maintenance and vacancy realistic? |
Note the last row. In practice a high net yield more often comes from understated costs than from an exceptional property.
The hardest test is your own borrowing rate. If net yield sits below it, leverage is working against you: every borrowed euro then lowers the return on your own money instead of raising it. That is not a marginal case in a market where rates sit near 5% and net yields sit in the threes. It is also why cash-on-cash on the same property can land below net yield rather than above it, which catches many investors out.
6. Four mistakes that distort the number
Maintenance set to zero or a token amount. A rule of thumb of 1% of the purchase price per year is more realistic for existing stock than an optimistic guess. For pre-1970 buildings, higher.
Vacancy left out. A property empty for one month every three years loses 2.8% of its rent, nearly a tenth of your net yield.
Interest included. Net yield describes the property, not your financing. Deducting interest measures something else: that is cash flow, and it deserves its own figure.
An annual amount in a monthly field, or the reverse. The least visible error of the four, because the result stays plausible. Enter an annual service charge into a monthly field and it is counted twelve times over, which can push net yield below zero. The reverse is worse, because nothing looks wrong at all: an annual charge entered as its monthly equivalent quietly removes most of the cost and lifts the yield. Check the unit on every cost line before you total them.
7. Run your own numbers
Enter your own figures above. For monthly cash flow, DSCR, cash-on-cash and the effect of financing over several years, the BRIX Calc rental calculator models the whole project.
8. Frequently asked questions
What is the difference between net yield and cap rate?
Net yield divides net income by the total investment you actually made; cap rate divides the same net income by the property's market value. At purchase they are close, but they diverge as soon as value moves. Net yield is an acquisition figure, cap rate a valuation figure.
Should mortgage interest be in net yield?
No. Net yield measures the property's return independently of how you finance it, precisely so two buyers with different loans can compare the same asset. Interest belongs in cash flow and in DSCR.
Why is my net yield so much lower than the gross yield the agent quoted?
Because agents usually quote gross yield, which deducts nothing. The two-point gap in the example above is normal: it is what the property costs each year.
What maintenance percentage is realistic?
For post-war stock in reasonable condition, 1% of the purchase price per year is a workable starting point. For pre-war buildings or deferred maintenance, 1.5% to 2% is more realistic. A well-funded service charge reserve lowers this, because major works run through the charge instead.
Can net yield be negative?
Yes, when operating costs exceed rent. It happens with prolonged vacancy, a large maintenance backlog, or service charges out of proportion to the rent. A negative net yield means the property costs you money to hold, regardless of financing.