A rental estimate can make an investment property look attractive, especially when the estimated market rent is higher than what the current tenant is paying. But investors need to separate two different numbers: the rent being collected today and the rent the market may support in the future.

That gap can affect cash flow, timing and the accuracy of an investment assessment.

What is current rent?

Current rent is the amount the tenant is actually required to pay under the existing tenancy arrangement.

It is the income that exists now.

For an investor assessing a property with a tenant already in place, current rent is usually the most relevant starting point for near-term cash flow because it reflects the legal and operational position at the time of purchase.

What is market rent?

Market rent is an estimate of what a similar property may achieve under current rental-market conditions.

It may be informed by:

• recently leased comparable properties
• current competing rental listings
• property condition
• bedroom and bathroom configuration
• parking and storage
• location and access to services
• overall supply and tenant demand

Market rent is useful, but it is still an estimate until a lease is actually agreed at that level.

Why can current rent and market rent be different?

There are several reasons.

A tenant may have signed the lease months earlier when market conditions were different. The landlord may have prioritised tenant retention. Rent reviews may occur only at certain times. The property may also have changed condition, or comparable rental evidence may have moved since the existing lease began.

The gap between current and market rent is therefore not automatically a mistake or an opportunity. It is a timing issue that needs context.

Why should investors avoid assuming an immediate rent increase?

Because a projected rent increase may not be available immediately.

Existing lease terms, notice requirements, rent-increase rules and the timing of settlement can all affect when a change may legally and practically occur.

There is also a commercial decision.

A higher advertised rent does not guarantee that the existing tenant will stay. If the tenant leaves, the investor may face vacancy, advertising costs, letting fees, cleaning or maintenance before a new lease begins.

The correct comparison is not simply “current rent versus higher rent.” It is the net effect of any change after allowing for timing, costs and tenant behaviour.

How should investors use rental comparables?

Rental comparables help test whether a market-rent estimate is realistic.

The strongest comparisons usually involve properties with similar:

• accommodation
• condition
• dwelling type
• parking
• land and outdoor functionality
• location characteristics
• leasing period

An advertised rent is also not the same as an achieved rent. Where possible, investors should distinguish between what landlords are asking and what tenants have recently agreed to pay.

That helps reduce the risk of building an investment case around an optimistic rental figure.

What does a rent gap mean for cash flow?

A difference between current rent and estimated market rent creates two different cash-flow views.

The first is current cash flow based on the rent actually being received.

The second is potential future cash flow if a higher rent is later achieved.

Both can be useful, but they should not be mixed together.

When investors model future income as though it exists from settlement, the property can appear stronger than its actual near-term position. A more disciplined approach is to model the current tenancy first, then separately test possible future scenarios.

What if the current tenant is reliable?

Tenant quality can have economic value even when the rent is slightly below the top end of the market.

A reliable tenant who pays on time, looks after the property and wants to remain long term may reduce vacancy and turnover costs.

That does not mean rent should never be reviewed. It means the decision should consider more than the weekly number.

Property investment is an operating business decision. Stable occupancy, maintenance behaviour, management workload and income consistency can all affect the real outcome.

How can investors make a more realistic rental assessment?

A practical process is to separate the analysis into three stages.

First, confirm the existing tenancy:

• current weekly rent
• lease expiry
• payment history
• any scheduled changes
  

Second, test the market:

• comparable leased properties
• competing listings
• likely tenant profile
• property-specific strengths and limitations
  

Third, model timing:

• when a rent review may be possible
• whether the tenant is likely to remain
• potential vacancy and reletting costs
• the effect on near-term and longer-term cash flow

This creates a clearer picture than relying on one optimistic rental estimate.

Conclusion

Current rent tells you what the property is earning now. Market rent estimates what the property may be able to earn under current conditions.

For investors, both numbers matter, but they serve different purposes.

A sound property assessment should use current rent for the immediate position, treat market rent as evidence for future scenarios, and account for lease timing, legislation, vacancy risk and tenant retention before assuming any uplift.

See Other Blogs: Buying a Tenanted Property: What Investors Should Check Before Settlement

TL;DR

• Current rent is actual income under the existing tenancy.
• Market rent is an estimate, not guaranteed immediate income.
• Lease timing and rental rules can delay any increase.
• Rental comparables should match the property as closely as possible.
• Model current and future cash flow separately.

FAQ