Rental guarantees: how they work and six questions to ask

Rental guarantees come up a lot with new house and land investment properties. They sound simple: rent is paid whether or not there’s a tenant. But they have a mixed history, and they’re easy to misunderstand. This page explains how they work, what the best and worst case look like, and six questions worth asking about any guarantee.

General information only, as at 6 November 2026.

What a rental guarantee is

A rental guarantee is an agreement to pay the owner a set weekly rent for a fixed period, whether or not the property is tenanted.

On the properties discussed on this site:

• Who provides it: the real-estate property management company that manages the property, under a written agreement with the owner. The property management company is an external business and is not part of the WPF Holdings group.
• Term: typically three years.
• It ends: when the term finishes, or earlier if the agreement allows it.
• It depends on the provider: it’s only as good as the property management company’s ability to pay for the whole term.

It isn’t insurance, and it isn’t backed by a government or a bank.

How it works week to week

Week	What happens	What you receive
Tenanted, tenant pays	Normal rent collected	The rent, less management fees
Tenanted, tenant pays less than the guaranteed amount	Rent collected, provider tops up	The guaranteed rent, less fees (if the agreement covers top-ups)
Vacant	No tenant	The guaranteed rent, paid by the property management company
After the term ends	Normal management	Only what a tenant pays, nothing for vacant weeks

Whether top-ups apply, and how fees are handled, depends on the agreement. It’s worth reading the agreement itself, not a summary.

Best case and worst case

The calculator above shows both.

Best case: tenanted for all three years

A tenant is in place every week of the guarantee. The guarantee is never called on. You receive market rent, and your holding cost is your costs minus that rent, adjusted for the estimated tax effect.

Worst case: empty all 52 weeks, for all three years

No tenant for the whole guarantee period. The property management company still pays the guaranteed rent every week. So you’re only short the gap between the guaranteed rent and your costs. The calculator shows that as a monthly figure.

That’s the main thing a rental guarantee does. It puts a known floor under your worst case for its term.

Year four and beyond

Once the guarantee ends, the worst case changes. An empty week means no rent at all. National rental vacancy was 2.4% in October 2026, a five-year high (Cotality). It’s worth looking at the numbers after the guarantee as well as during it.

Why rental guarantees have a poor reputation

They deserve some scepticism. The common problem in the past has been this: a seller inflates the price of a property, then uses part of that inflated price to fund an above-market “guaranteed” rent. The buyer feels protected for a few years, but has paid more than the property is worth. When the guarantee ends, the rent drops to market, and the property may be valued at less than was paid.

Other issues people have run into:

• Guarantees from companies that couldn’t pay.
• Conditions buried in the agreement that ended the guarantee early.
• A requirement to use a specific manager, at higher fees.
• Guaranteed rent set well above what the property would actually rent for.

Why showing the numbers matters

The answer to that reputation is transparency. If the price can be compared with an independent valuation, and the guaranteed rent can be compared with an independent rental appraisal, a buyer can see whether the guarantee is being paid for in the price.

That’s also why the calculator shows the worst case rather than only the best case. The worst case is what a guarantee is meant to cover, so it belongs on screen.

Six questions to ask about any rental guarantee

1. Who pays, and what backs it?

Which company is the guarantor? Is it the property management company, the developer or someone else? What would happen if that company stopped trading? Is there any security behind the promise?

2. What’s the term, and what ends it?

When does it start: at settlement, at completion, or when the property is first available to rent? When does it finish? What events end it early, such as selling the property, changing manager, refusing a tenant or falling behind on the loan?

3. What are the conditions?

Do you have to use a nominated property manager? At what fees? Do you have to accept any tenant they approve? Are there rules about repairs, furnishing or insurance?

4. How does the guaranteed rent compare with an independent appraisal?

Ask an independent local property manager what the property would rent for. If the guaranteed rent is well above that, ask why.

5. Is the cost of the guarantee reflected in the price?

Compare the purchase price with an independent valuation. Lenders usually order their own valuation as part of a credit assessment, and that can also be telling.

6. What’s my cost when it ends?

Run the numbers at market rent, with some vacancy, after the guarantee. Can you carry that, on top of your own rent?

Tax treatment

Payments under a rental guarantee are generally assessable income, in the same way as rent. The ATO’s residential rental properties guide covers rental income generally. A registered tax agent can explain how it applies to you.

The short version

A rental guarantee:

• is provided by the property management company,
• runs for a fixed term, typically three years,
• ends,
• depends on the provider paying,
• and changes the worst case only while it lasts.

The calculator above shows that worst case. An independent valuation and rental appraisal show whether the guarantee is fair.

See a guarantee explained live

If you’d like to see how a rental guarantee changes the best and worst case on a real example, join a free WPF GO webinar with Peter Khoury. General information only, not personal advice.