If you’re a landlord in the UK, the numbers around lease renewals can be sobering. Replacing a tenant typically costs 8 to 12 times more than simply renewing their lease, with the total cost of a single turnover landing between £2,800 and £4,500 for a standard property. That figure isn’t just a theoretical risk — it represents real cash lost to void periods, agent fees, and the gamble of taking on a new tenant.
I’ve spent years covering the UK rental market, and this is the question that comes up more than any other: “How much should I raise the rent without losing a good tenant?” The answer isn’t just about what the market will bear. It’s about understanding the full cost of a vacancy and knowing exactly when to start the conversation. Here’s what you actually need to know.
If you’re managing a portfolio of even a handful of properties, two preventable vacancies a year could mean £5,600 to £9,000 in avoidable losses. That’s money you could keep by getting the renewal process right. A solid understanding of your costs and timing is the first step toward protecting your income.
What a lease renewal cost comparison actually involves
The core idea is simple: compare the cost of renewing a lease against the cost of finding a new tenant. But the numbers are rarely straightforward. Most landlords focus on the obvious costs — lost rent during a void period, letting agent re-letting fees — and miss the hidden ones like the risk premium of a worse replacement tenant, which can add £500 to £1,000 to the total.
What I tend to notice is that landlords who only look at the rent figure — “I can get £100 more per month from a new tenant” — often miss the bigger picture. That extra £1,200 a year can vanish quickly if the property sits empty for three weeks and you’re paying £600 in agent re-letting fees. The real question is whether the net gain after all costs is worth the hassle.
Why the timing of your renewal conversation matters more than the rent figure
Starting the renewal conversation early is the single most effective thing you can do. Landlords who begin the process 90 days before the lease expires achieve renewal rates 18 to 22 percentage points higher than those who wait until 30 days before. That’s the difference between a 65% renewal rate and an 85% one.
Consider a scenario where you own a property in the North East, where rents rose 6.5% in the year to April 2026 — the highest regional increase in England. You might be tempted to push for a big rent rise. But if your tenant is reliable, pays on time, and looks after the property, losing them over an extra £50 a month could cost you far more. The national average rent increase of 3.5% provides a useful benchmark, but your local market and your tenant’s quality matter more.
My own view is that the 90-day window is non-negotiable. It gives you time to research comparable rents, gauge your tenant’s intentions, and negotiate without pressure. Rushing the conversation at 30 days leaves you with no room to manoeuvre if the tenant decides to leave.
Where landlords get the cost comparison wrong
Most mistakes in lease renewal decisions come down to miscalculating the true cost of a vacancy or misjudging the tenant’s value. Here are the most common errors I see.
Ignoring the hidden costs of turnover
The obvious costs — lost rent during a void period and agent re-letting fees — are only part of the picture. A full breakdown includes cleaning and minor repairs (£200–£500), advertising (£50–£200), referencing and checks (£80–£150), time and administration (£200–£400), deposit return processing (£50–£100), and the risk premium of a worse replacement tenant (£500–£1,000). When you add it all up, the total per vacancy for a standard 2–3 bed property in England is £2,800–£4,500 or more. That’s the number you need to compare against any proposed rent increase.
Overestimating what a new tenant will pay
It’s easy to look at market data and assume you can get top dollar from a new tenant. But the regional variation in rent growth is significant. In London, rents rose just 2.0% in the year to April 2026, while the North East saw 6.5% growth. If you’re in a slow-growth area, the premium you can command from a new tenant may be much smaller than you think. A good tenant at 5–10% below market rate is often worth keeping, especially when you factor in the risk of arrears or damage from an unknown replacement.
Starting the conversation too late
Waiting until 30 days before the lease expires is the most common mistake. At that point, the tenant may have already decided to leave, and you have no time to negotiate or find a replacement without a void period. The data is clear: landlords who start at 90 days see renewal rates 18–22% higher. If you’re not sure how to approach the conversation, a guide on navigating rental conflicts can help you handle the discussion professionally.
Failing to calculate the break-even rent increase
Many landlords set a rent increase based on what they want, not what the numbers justify. The break-even point is the maximum increase you can propose before it becomes cheaper to find a new tenant. If your turnover cost is £3,500 and you expect a void period of 22 days, you can afford to leave a significant amount of money on the table and still come out ahead. A common strategy is to increase rent by CPI inflation plus a small margin — typically 0.5–1%. With CPI at approximately 2.8% in March 2026, that suggests an increase of 3.3–3.8%, broadly in line with the national average.
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| Cost category | Typical range | Notes |
|---|---|---|
| Void period (22 days avg) | £800–£1,600 | Lost rent during vacancy |
| Letting agent re-let fee | £400–£900 | 50–100% of one month’s rent |
| Cleaning and minor repairs | £200–£500 | Make-ready between tenancies |
| Advertising | £50–£200 | Rightmove, Zoopla, photos |
| Referencing and checks | £80–£150 | Credit, employment, landlord refs |
| Time and administration | £200–£400 | Viewings, negotiations, inventory |
| Deposit return processing | £50–£100 | DPS admin, dispute resolution |
| Risk premium (worse tenant) | £500–£1,000 | Higher arrears risk, more wear |
| Total per vacancy | £2,800–£4,500+ | Standard 2–3 bed property |
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How to compare lease renewal costs and make the right decision
Here’s a practical process you can follow for every renewal decision. It’s based on the data and timelines that actually make a difference.
Calculate your full turnover cost before you set a rent increase
Start with the total cost of a vacancy — £2,800 to £4,500 for a standard property. Divide that by the number of months in your proposed new lease term to get the monthly cost of turnover. For a 12-month lease, that’s £233 to £375 per month. That’s the amount you can effectively “spend” on keeping your current tenant by offering a below-market rent increase. If your tenant is paying £1,200 a month and you could get £1,300 from a new tenant, the £100 monthly gain is less than the monthly cost of turnover — so renewing at £1,200 is the better financial decision.
Start the renewal process 90 days before expiry
Follow the proven timeline: at 90 days, review the tenant’s payment history and maintenance requests. At 75 days, contact them informally to gauge their intentions. At 60 days, send a formal renewal offer with the proposed new rent and term length. Give them 14 to 21 days to respond. At 45 days, follow up and negotiate if needed. At 30 days, make your decision — if they decline, begin re-letting immediately. This schedule gives you the best chance of retaining the tenant and avoids the panic of a last-minute vacancy.
Use a retention discount strategy
Some landlords explicitly offer a “retention discount” — a rent increase deliberately below market rate, positioned as a benefit of staying. For example, if market rent for comparable properties is £1,450, you might offer your current tenant £1,400, explaining that the discount reflects their reliability and the value of a long-term relationship. This approach works because it frames the increase as a fair deal rather than a demand. If you’re unsure about the legal wording, consulting a tenant landlord lawyer can help you draft a renewal agreement that protects both parties.
Factor in regional rent trends
Your local market matters more than national averages. In the North East, where rents rose 6.5%, you have more room to increase rent without losing the tenant. In London, where growth was just 2.0%, pushing for a big increase is riskier. In Scotland, annual rent inflation has been slowing and stood at just 2.0% in April 2026 — the lowest rate in over four years. Use the ONS regional data to set a realistic benchmark, then adjust based on your tenant’s quality and the local competition.
Consider the future of renting in the UK
The rental market is evolving. With house prices flat — unchanged at £268,000 in the year to March 2026 — more people may continue renting for longer, which could increase demand for good properties. That’s a reason to hold onto reliable tenants now, because finding replacements may become more competitive. For a broader view of where the market is heading, trends and predictions for UK renting offer useful context for your renewal strategy.
Frequently asked questions about lease renewal costs
What if my tenant asks for a rent reduction instead of an increase? ▾
How do I handle a tenant who refuses to sign a renewal at any rent? ▾
Should I offer a longer lease term to keep a good tenant? ▾
What’s the best way to research market rents for my area? ▾
Can I increase rent by more than CPI inflation? ▾
What if I use a letting agent — do the same rules apply? ▾
The key takeaway is simple: a good tenant is worth more than a marginal rent increase. Calculate your full turnover cost, start the conversation early, and use regional data to set a realistic offer. If this was useful, you might also want to read What to Know About Tenant Rights When Ending a Lease.
Sources and Further Reading
Apartment Rental Lease Signing Checklist for UK Renters — A practical checklist to ensure nothing is missed when signing a new lease or renewal.
Tips from Tenant Unions for Renting in the UK — Understand tenant perspectives to improve your renewal negotiations and retention rates.
The True Cost of Tenant Turnover and Renewal Timelines. Uselatch, 2026.
Private Rent and House Price Data, UK. Office for National Statistics, April 2026.
Lease Renewal Analysis Calculator. Tools.RealEstate, 2026.
