Letting agency software is the system that runs a lettings business end to end: properties, landlords, applicants, tenancies, compliance, maintenance and money, in one place. That sounds simple until you try to buy it. The market mixes true agency platforms with landlord apps, sales CRMs wearing a lettings badge, and single-purpose tools that cover one task brilliantly and nothing else. This guide is a from-scratch explanation for UK agency owners: what the software actually is, the modules that matter, what each buying route really costs per month, how implementation works, and the questions that separate a good vendor from a good salesperson.
What letting agency software actually is
A letting agency sits between three parties: landlords who own property, tenants who live in it, and contractors who maintain it. The agency's product is trust and process, delivered under some of the heaviest regulation in UK small business. Proper letting agent software models all of that in one database. A property record connects to its landlord, its current tenancy, its compliance certificates, its maintenance history and its rent ledger, so any member of staff can answer any question in seconds without opening four systems.
That single-database point is the heart of it. The alternative is data scattered across an inbox, a spreadsheet, a referencing portal and an accounting package, with your team acting as the integration layer, re-keying the same tenant's details five times. Every re-key is a chance for an error, and in lettings an error is rarely cosmetic: it is a deposit protected late, a Section 13 notice served with the wrong date, or a gas certificate that quietly lapses.
It also helps to think of the product in two halves. The front office is everything up to a signed tenancy: applicant registration, viewings, offers, referencing and onboarding. The back office is everything after: rent, arrears, repairs, inspections, certificates, statements and remittances. Sales-flavoured CRMs are strong on the first half and thin on the second; landlord self-manage apps are the reverse. An agency needs both halves working from the same records, because the handoff between them, the moment an applicant becomes a tenant, is exactly where re-keyed data goes wrong.
The modules checklist
Whatever the vendor calls them, a complete platform needs eight capabilities. Use this as your evaluation checklist and ask to see each one demonstrated, not described.
| Module | What it must do | What happens without it |
|---|---|---|
| Lettings CRM | Applicants, viewings, offers, and matching people to properties | Leads live in inboxes and die there |
| Marketing and portals | Listings pushed to Rightmove and OnTheMarket with photos, floor plans and descriptions | Manual double-entry into each portal |
| Tenant onboarding and referencing | Digital application, referencing, Right to Rent, AML, guarantors, e-signed agreements | Paper chases and week-long move-in delays |
| Compliance | Gas, EICR, EPC, deposits, licensing and Renters' Rights Act duties tracked with automatic reminders | Expiry dates surface as penalties, now up to £40,000 |
| Maintenance | Tenant reporting with photos, triage, contractor assignment, landlord approval, audit trail | Repairs progress by phone tag; Awaab's Law timescales get missed |
| Client accounting | Rent collection, arrears, landlord statements and remittances, fees, NRL tax, accounting sync | Month-end takes days and client money errors creep in |
| Portals and mobile apps | Self-service apps for tenants, landlords and contractors | Your team is the portal, one call at a time |
| Reporting | Portfolio, arrears, compliance and team performance at a glance | Decisions made on feel rather than fact |
Two of these deserve special weight in 2026. Compliance has changed shape: since the Renters' Rights Act commenced on 1 May 2026 every tenancy is periodic, rent rises require annual Section 13 notices, and possession needs evidenced Section 8 grounds, so the module must model periodic tenancies natively rather than assuming fixed terms. And client accounting is where agencies most often discover their "complete" system is nothing of the sort; if landlord statements and remittances are not built in, you have bought a CRM, not an agency platform.
Build, buy or stack: the real economics
There are three ways to assemble this capability, and the honest comparison is monthly cost plus integration burden, not headline price. The figures below are typical market ranges for an agency of around 50 managed properties; your quotes will vary, but the shape of the comparison will not.
| Route | Typical monthly cost (50 properties) | Upfront cost | Time to live | Who maintains it |
|---|---|---|---|---|
| Build your own | Hosting plus a developer on call | £40,000 to £150,000+ | 6 to 18 months | You, forever |
| Stack of point tools (4 to 6 products) | £500 to £1,000 across subscriptions and per-tenancy fees | Low per tool | Days per tool, weeks overall | You are the integration layer |
| Enterprise CRM | Per-user licences, often £400+ for a small team | Setup fees common | Several weeks | Vendor, with change requests |
| All-in-one platform (LettingGuru) | £374 all-in (£299 base plus 50 × £1.50) | None | Under a week | Vendor, continuously updated |
Building your own software makes sense for almost nobody below several thousand units; the sector's regulations change too often for a bespoke system to stay current. The stack looks cheap tool by tool but rarely is once per-tenancy onboarding fees and the hours spent reconciling systems are counted. The genuine decision for most independent agencies is between an enterprise CRM and a modern all-in-one, and it usually turns on size: per-user licensing and multi-week onboarding are reasonable at forty branches and hard to justify at four staff.
Whichever route you take, price it at the size you plan to be, not the size you are today. Per-user models grow more expensive with every hire, per-tenancy fees rise with your lettings volume, and stacks add a subscription each time you discover a gap. A base-plus-property model such as LettingGuru's grows by £1.50 per additional property and nothing else moves, which is the kind of arithmetic you can put in a business plan and trust two years later.
Implementation and migration, step by step
Fear of migration keeps more agencies on failing systems than any other factor, so it is worth demystifying. A competent switch to a modern platform follows five steps.
- 1. Data audit. List what lives where: properties, landlords, tenancies, deposits, certificates, keys, contractor details. Decide what is worth bringing and what is archive material.
- 2. Import. Good vendors import your core data for you from spreadsheets or exports of the old system. For a typical independent agency this is days, not weeks.
- 3. Verify compliance-critical records first. Check deposit registrations, certificate expiry dates and rent schedules before anything else; these are the records where an import error costs real money.
- 4. Parallel-run briefly. Run the old and new systems side by side for a couple of weeks, with new work done only in the new system so the old one naturally drains.
- 5. Train by role. A negotiator, a property manager and a bookkeeper each need a different hour of training, not a shared all-day session. Then switch off the old system; paying two subscriptions indefinitely is the most common hidden migration cost.
Timed sensibly, the whole process fits inside a month without disrupting rent runs. Agencies that migrated around the Renters' Rights Act commencement found the exercise doubled as a compliance audit, surfacing missing certificates and unprotected deposits the old system had never flagged; our periodic tenancy workflow guide covers what the new system needs to track from day one.
Ten questions to ask any vendor
- 1. Is your pricing published, and what exactly is excluded from the quoted figure?
- 2. Are there per-user fees, per-tenancy fees, setup fees or paid modules on top?
- 3. How does the system model a periodic tenancy, a Section 13 rent review and a Section 8 evidence trail?
- 4. Is client accounting, including landlord statements and remittances, native or an integration?
- 5. Do tenants, landlords and contractors get real mobile apps, and can we see them?
- 6. How do listings reach Rightmove and OnTheMarket, and is the feed included?
- 7. What does data migration involve, who does the work, and what does it cost?
- 8. How do we get our data out if we leave?
- 9. What support is included: hours, channel and typical response time?
- 10. What has shipped in the last six months? A quiet changelog means a product in maintenance mode while regulation moves.
Question 8 is the one agents skip and regret. A vendor confident about exit is a vendor betting you will stay for the product, which is the only good reason to stay.
Frequently asked questions
What does letting agency software do?
It runs the full lettings lifecycle in one system: marketing and applicant management, tenant onboarding and referencing, tenancy and compliance records, maintenance workflow, rent collection and landlord accounting, plus self-service portals for tenants, landlords and contractors.
What is the difference between letting agency software and a CRM?
A CRM manages contacts and pipeline, which is one module of the eight an agency needs. Letting agency software adds tenancy management, compliance tracking, maintenance and client accounting. Plenty of agencies have bought a CRM believing it was a platform and discovered the difference at month-end.
How long does it take to switch systems?
For a typical independent agency, under a month: a few days of data import and verification, a fortnight of parallel running, and role-based training measured in hours. The compliance-critical records deserve the most careful checking.
Do small agencies really need dedicated software?
Below ten or so properties you can survive on spreadsheets, though deposits, certificates and the Renters' Rights Act duties still all carry penalties for a missed date. Past that point the admin hours alone usually cost more than a platform does; from £299 per month, LettingGuru is priced deliberately so that small and new agencies can afford the same tooling as large ones.
What should letting agency software cost?
Expect a base fee plus a per-property element for transparent platforms, per-user licensing for enterprise CRMs, and a pile of separate subscriptions for a stack. Our 2026 price guide works through the models with real numbers.
The practical next step
Reading feature pages only gets you so far; the fastest way to evaluate any platform is to put your own portfolio into it. You can start a free 30-day trial of LettingGuru with no card and every feature switched on, and see our pricing page for exactly what it costs as you grow. For the comparison shopping stage, our honest UK software comparison sets the market out category by category.