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Short-term let calculator

Start with the numbers. Continue with the context.

Estimate purchase costs, monthly cash flow and returns for a property let on Airbnb or a similar platform. Adjust the assumptions and every figure updates instantly. All amounts in South African rand.

Your assumptions

Model the purchase, the income and the running costs.

Every input below feeds the results panel in real time. Change a slider and the cash flow, yields and break-even occupancy move with it.

Purchase and financing
R2 500 000
10%
10.75%
20

Transfer duty (auto)

R67 200

SARS 2025/26 brackets

Total cash to invest

R557 200

Deposit + duty + fees + setup

Monthly bond repayment

R22 843

Loan of R2 250 000 over 20 yrs

Short-term letting income
R1 400
60%
3
Operating costs
15.0%
0%
5.0%

Results

Indicative figures based on the assumptions you have entered.

Gross monthly revenue

R28 272

18 nights, ~6 stays/month

Operating costs / month

R14 886

Excl. bond

Net operating income

R13 386

Before financing

Monthly cash flow

−R9 457

After bond repayment

Gross yield

13.6%

Annual revenue / price

Net yield (cap rate)

5.7%

Annual NOI / total cost

Cash-on-cash return

-20.4%

Annual cash flow / cash in

Break-even occupancy

89%

Cash flow = zero

Estimates only. Excludes income tax, capital growth and vacancy risk between seasons. Confirm body corporate rules permit short-term letting before purchasing a sectional title unit.

What these terms mean

Understand the numbers before relying on them.

Return figures are only useful when you know what is included, what is excluded and what could change them.

Gross yield

Annual rental income before expenses, divided by the property price. It is a quick comparison metric, not a profit figure.

Net yield

Rental income after operating costs, divided by the property price. It is closer to the real cash return but still excludes financing and tax.

Cash flow

The money left each month after bond repayments and operating costs. Positive cash flow reduces the cost of holding the property.

Occupancy

The percentage of available nights or months the property is rented. A small change in occupancy can have a large impact on income.

Capital growth

The change in the property’s market value over time. It is not guaranteed and can vary sharply between estates and market cycles.

Why owner use changes the model

Using the property yourself reduces rental nights and changes expenses, cleaning schedules and guest expectations. The model must reflect that.

Talk it through

A spreadsheet cannot understand your full situation.

Talk through your budget, intended use and the assumptions that matter.