Every self-managing landlord can tell you exactly what an agent would cost them. Very few can tell you what self-managing costs them, because those costs arrive disguised — as a void that ran three weeks long, a plumber paid at retail rates, an evening lost to a deposit dispute. This piece is the comparison we wish more landlords ran before deciding: not "fee versus no fee", but the full cost of each route, counted honestly.

Start with the visible number

In London, full management typically costs between 12% and 20% of the monthly rent depending on the agent and postcode, with VAT often on top — always check. On a £2,000-a-month tenancy, a 12% + VAT fee is £288 a month, or £3,456 a year. That is the number that makes landlords wince, and it is the right place to start. The question is what stands on the other side of the ledger. We break down exactly what that fee buys in our guide to what a property manager actually does.

Now count the invisible ones

Self-managing has four costs that rarely make it into the comparison. Be honest about each.

1. Your time, priced properly

Advertising, a dozen viewings, referencing, drafting the agreement, protecting the deposit, the inventory, mid-term inspections, arranging repairs, the renewal conversation, the check-out. Self-managing landlords routinely spend several hours a month on a single property, and far more in the weeks around a tenancy change. Multiply your realistic hours by what your time is actually worth — your hourly earnings, or simply what your evenings are worth to you. For most professionals, this line alone rivals the management fee.

2. Voids and pricing errors

Agents remarket before notice expires, have applicant lists ready, and price from live comparable data. Self-managing landlords usually start marketing after the tenant leaves and price from instinct. On a £2,000-a-month property, every week empty costs about £460. Two extra void weeks a year — a very common gap between managed and self-managed — is close to £1,000, before you count overpricing that sits unlet or underpricing that runs for twelve months. Our piece on what voids really cost goes deeper.

3. Maintenance at retail prices

An agency placing steady volume with contractors pays trade rates and knows when a quote is padded. A landlord ringing a plumber found on a search engine pays retail and cannot easily judge the invoice. Add the cost of small faults missed until they become big ones — the classic is a slow leak that becomes a ceiling — and a professional repairs and maintenance operation frequently claws back a meaningful slice of its own fee.

4. Compliance and legal risk

This is the line that has grown fastest. Deposit errors carry penalties of up to three times the deposit. Letting an unlicensed property in a selective licensing area — and London boroughs added several schemes in 2025–26 — exposes you to civil penalties and rent repayment orders, which under the Renters' Rights Act regime can now reach 24 months' rent. Since May 2026, possession itself runs entirely on grounds and evidence: a self-managing landlord with thin records is at a genuine disadvantage the day a tenancy goes wrong. You will not pay this cost most years. The years you do, it can exceed a decade of management fees.

Self-management is cheapest in the years when nothing goes wrong. The problem is that you do not get to choose those years in advance.

The regulation treadmill is the hidden workload

Ten years ago a diligent self-manager could learn the rules once and coast. That era is over. In the last eighteen months alone, English landlords have absorbed the largest tenancy reform in a generation (May 2026), confirmation of a 2030 energy-efficiency target for rentals, the arrival of Making Tax Digital for higher-income landlords (April 2026), and a steady spread of borough licensing schemes across London — each with its own application, fee and conditions. None of these is unmanageable individually. The workload is in the watching: knowing a change is coming, understanding whether it applies to your property, and acting before the deadline rather than after the penalty. An agent spreads that vigilance across hundreds of tenancies; a self-manager carries all of it for one. When landlords tell us why they finally handed over management, the trigger is rarely a disaster — it is the creeping realisation that keeping up had become a subscription of evenings they never agreed to pay.

A worked comparison

Agent route on a £2,000/month let: roughly £3,500 a year in management fees at 12% + VAT, plus letting and inventory costs per the schedule of fees
Self-managed route, honest version: 40–60 hours of your time a year, one to two extra void weeks (£500–£1,000), retail-priced maintenance, and a small but real annual probability of a four- or five-figure compliance or possession cost
Middle route: a rent-collection-only service covers the money side at a lower fee while you keep maintenance — see our rent collection service

Run those lines for your own property and the result is rarely the landslide either camp claims. What decides it is your circumstances: distance from the property, spare time, appetite for tenant contact, and how confident you are keeping pace with regulation that now changes yearly. Be especially honest about the time line — landlords consistently remember the quiet months and forget the tenancy-change fortnights, which is where most of the hours actually live. If you have never logged your landlord hours for a full year, including the reading-up, assume your estimate is low.

When self-managing genuinely makes sense

You live close to the property and can attend it within a day
You have one property, a stable long-term tenant and time you enjoy spending on it
You actively track regulation — you knew about the May 2026 tenancy changes before your tenant did
You have a reliable trades network you have used for years
You treat it as a part-time job, with records to match

When an agent wins

You live abroad or outside London; you have a demanding job; you own more than two properties; the tenancy is in a licensing borough; or you simply never want to take the 7am boiler call. In those cases the fee is not an expense so much as an insurance premium with a service attached — and unlike most insurance, it works for you all year rather than only when things go wrong. If you want to see the maths for your specific property, request a quote — we will set out the fee against a realistic estimate of what it replaces, and if self-managing genuinely suits you better, we will say so.

Self-Managing vs Using an Agent: The Honest Maths