Letting agent or self-manage? An honest cost comparison

The question comes up in every landlord forum, every conveyancer’s waiting room, every post-void-period panic: should I pay for a letting agent, or just do it myself?

The honest answer is: it depends — but not in the hand-wavy way most comparison articles mean. The maths is fairly clear, the compliance risk is measurable, and the gap between “agent-grade tooling” and DIY is much narrower than it was five years ago. Here is what the numbers actually look like.

What a full-management agent really costs

The headline percentage always sounds reasonable. Full management is typically quoted at 10–15% of monthly rent, but the real figure is consistently higher once you factor in the extras buried in the terms of business.

On an average English private rent of £1,438 per month (ONS, April 2026), a 12% management fee is £172.56 a month — £2,071 a year. But that is rarely the end of it:

• Tenant-find / placement fee: typically 50–100% of one month’s rent, or a £500–£1,500 fixed fee, each time you re-let
• Initial setup fee: £200–£500
• Inventory and check-in/check-out: £100–£250
• Tenancy renewal: £100–£300
• Maintenance markup: many agents apply a 10–25% markup on contractor invoices — legal, buried in the terms, rarely volunteered
• Inspection fees: £50–£100 per visit

Add it all up and a 12% headline fee can comfortably land in the high teens as a share of rent once re-lets, renewals and markups are counted. On a single property at £1,438 a month, that is somewhere in the region of £2,800–£3,500 a year — every year, in perpetuity.

Over five years on one property, you are well into five figures in management costs alone.

What self-management actually costs (and risks)

Self-managing is not free in either money or time. The genuine costs are:

• Tenant-find / advertising: roughly £49–£150 on the major portals (OpenRent, for instance, lists from £49 with a Rightmove upgrade)
• Tenant referencing: from £14 per reference with a service like PropertyGoose — with AML, ID verification and full credit included — versus £50+ per applicant through many agents
• Tenancy agreements and compliance tooling: a few pounds a tenancy through purpose-built software

A realistic all-in annual cost for a single, well-run property sits in the low hundreds — a saving of well over £2,000 a year versus full management on an average-rent property, and the gap widens as rents rise.

The risk is not cost; it is compliance. This is where most landlords who tried self-management and retreated to an agent report having come unstuck.

The compliance problem has just become much harder to ignore

The Renters’ Rights Act 2025 received Royal Assent on 27 October 2025, with the bulk of its provisions taking effect on 1 May 2026. It is the biggest overhaul of the private rented sector in a generation. The key changes every self-managing landlord now needs to be on top of:

• No more Section 21. All assured tenancies have converted to periodic tenancies. Possession now requires a valid ground and proper notice — and the mandatory rent-arrears threshold under Ground 8 has moved from two months to three months (with a 4-week notice period).
• Rent increases limited to once a year, to market rate, via the statutory Section 13 process, with at least two months’ notice.
• Private rented sector database registration is mandatory. Landlords cannot use certain possession grounds while unregistered, and continuing or repeated breaches can attract penalties up to £40,000 or criminal prosecution (initial civil penalties up to £7,000).
• Ombudsman membership is compulsory for landlords. Non-compliance carries civil penalties up to £7,000, rising to £40,000 or prosecution for repeated breaches.
• Decent Homes Standard now applies to the private rented sector, with civil penalties up to £7,000 for non-compliance.

None of this is unmanageable. But it is process-heavy. The landlord who was skating along on informal arrangements and a Word-document tenancy agreement is now exposed in a way they were not before.

Critically, using an agent does not make compliance automatic — you still own the property, and you still carry ultimate legal liability. The agent is a convenience layer, not an indemnity.

The middle ground: where most landlords should actually sit

The 2024 English Private Landlord Survey found that 52% of landlords do not use an agent to let or manage their properties — a similar level to 2021 (49%). Agent use correlates strongly with portfolio size: 63% of landlords with five or more properties use an agent for letting, against just 30% of single-property landlords. The implication is not that agents are inherently better; it is that complexity and time eventually tip the equation.

For most landlords with one to four properties, the optimal position is not full management, and not flying blind — it is using purpose-built tools that provide the structure and paper trail compliance demands, at a fraction of the cost.

Check the PropertyGoose pricing page and you will see referencing from £14 a check, and a full-lifecycle plan — references, tenancy agreements and AML included — at £29.50 per tenancy per year. That is not a discount compromise; it is what good referencing and tenancy management should cost when it is not bundled into a 12% ongoing fee.

A worked example: one property, five years

	Full management (12%)	Self-manage with good tools
Monthly management fee	~£172	£0
Tenant-find / setup (amortised)	~£180/yr	~£100/yr
Referencing + agreement (per tenancy)	included	from £29.50/yr
Maintenance markup (est. 15%)	~£300/yr	£0
Annual total (est.)	~£2,800	~£250–£350
Over 5 years	~£14,000	~£1,250–£1,750

These are estimates, not guarantees — but the order of magnitude is reliable. The roughly £12,000 difference over five years is money that either stays in your pocket or services a second property.

When an agent is genuinely the right call

This is not a polemic against agents. There are situations where full management makes real sense:

• You live a long way from the property and cannot attend in person
• You have five or more properties and the time cost is genuinely unsustainable
• You are letting a high-value property where a mis-step has outsized consequences
• You have no capacity to respond to maintenance emergencies — a persistent damp issue or a boiler failure needs someone who can act fast

Even then: review the contract line by line. Understand the maintenance markup clause. Get clarity on what triggers the renewal fee and what happens if you want to leave.

What the gap actually looks like in 2026

The honest case for full management used to rest on two pillars: professional tenant-find and compliance expertise. Both have eroded.

Platforms like OpenRent mean a self-managed property can be advertised on Rightmove and Zoopla identically to an agent-managed one. And tools like PropertyGoose — built by ex-letting agents — now cover the full tenancy lifecycle: referencing, offers, tenancy agreements and AML. Our comparison page sets out concretely what you get versus the traditional full-management route.

The compliance burden under the Renters’ Rights Act is real, but it is largely process compliance — knowing what documents go out, when, and in what format. That is learnable. And with the right tooling, it is repeatable.

The bottom line

A 10–15% management fee made more sense when it bought expertise that was genuinely hard to replicate. The expertise is still there with a good agent; the question is whether it is worth a few thousand pounds per property per year when the same compliance outcomes are achievable for a small fraction of that.

For most landlords with up to four properties, the maths firmly favours self-management with professional tools. For those who are genuinely time-poor, geographically remote, or managing a large portfolio, an agent’s overhead may be worth paying — but scrutinise the contract first.

If you want to see what agent-grade referencing and tenancy management looks like without the agent-grade bill, book a 20-minute demo and we will walk you through it.