The renewal letter that causes a void.
How to spot when a landlord’s rent expectations will cost them their tenant – and act before it’s too late.
Kieran Slinger · Propalt · For letting agents
Keeping a tenant is cheaper than replacing one, almost every time. A void plus referencing, cleaning, a new agreement and marketing rarely costs less than a month's rent, often two. A tenant who renews costs the landlord nothing and the agent no admin.
Yet renewal gets treated as paperwork, not the moment that decides whether someone stays. Letter goes out, outcome treated as a coin toss. It isn't. The clearest reason a tenant walks is a renewal rent pitched higher than what they'd pay for a near-identical place one short move away.
When renewal rent becomes a departure trigger
Most tenants do not leave because they dislike the property or the landlord. They leave because the renewal rent puts them into a mental calculation where moving starts to look like the financially rational choice. Once that calculation tips, the tenancy is lost – and by the time the agent discovers it, the tenant has already viewed alternatives.
The agent who runs the renewal rent comparison before the letter goes out is the one who avoids that calculation ever forming. If the proposed renewal rent sits at or below market for comparable properties in the area, the tenant has no rational reason to move. If it sits significantly above market, the agent knows this before the tenant does and can advise the landlord on a pricing approach that retains the tenancy.
| Property: 2-bed flat, E2 – renewal due Aug 2025 | Figure | Notes |
|---|---|---|
| Current rent | £2,100 pcm | Agreed Oct 2023 |
| Proposed renewal rent | £2,400 pcm | +14.3% |
| Comparable lets (last 3 months) | £2,150–£2,350 pcm | 4 comparables |
| Position of proposed rent | Above top of range | Departure risk: HIGH |
| Recommended renewal rate | £2,280–£2,320 pcm | Retains tenant, at market |
That analysis – run before the renewal letter goes out – tells the agent that the landlord's proposed increase will position the property above the top of the local comparable range. A tenant who checks Rightmove at renewal will find they can move to a comparable property for £50 to £100 per month less. Many will.
The recommended renewal range keeps the landlord at market, retains the tenant, and avoids the void. The landlord earns slightly less per month than they wanted. They earn significantly more over the year than they would have with a two-month void.
Making renewal risk visible across the portfolio
For an agent managing fifty or a hundred properties, running this analysis manually for each approaching renewal is impractical. The Propalt Renewal Risk Predictor does it automatically for every managed property approaching renewal, flagging those where the proposed or expected rent is above the local comparable range and quantifying the departure risk.
The result is a prioritised list of renewal conversations to have this month – the landlords who need to be advised that their rent expectation will cost them their tenant. That is active portfolio management. And it is the difference between an agent who prevents voids and one who reports them.
The renewal letter is not the end of the tenancy management process. It is the moment the next void either happens or doesn't.
Flag every renewal risk before the letter goes out.
Try the Renewal Risk Predictor → propalt.ai
Comparable rental data sourced via the Propalt intelligence layer. Renewal risk flags are indicative. This article is general information for letting professionals.
Renewal Risk Predictor
For managed properties approaching renewal, cross-references local rental comparables to flag whether current rent is above or below market – preventing surprise departures.
🎯 Best used for
Retention & renewals management
🔌 Propalt APIs used
get_comparable audience_letting_property get_monthly_market
