The Spreadsheet Problem
According to recent surveys, around 67% of UK landlords use spreadsheets to track their rental properties, compliance dates, tenant details, income, expenses. Excel and Google Sheets are free, familiar and flexible.
So what's the problem?
The answer is that spreadsheets are passive. They show you data. They don't tell you when something is about to go wrong. They don't send you a reminder at 11pm on a Tuesday when you've forgotten to book your annual gas inspection. They don't warn you that your EICR at 7 Oak Avenue expires next month.
What Spreadsheet Landlords Miss
Here are the most common compliance failures that happen to spreadsheet users:
Lapsed Gas Safety Certificate
Easy to miss. It renews annually. You're busy. The date slips past. You have just committed a criminal offence carrying an unlimited fine, and handed a tenant material for a disrepair counterclaim. (It used to invalidate a Section 21 notice too, but Section 21 was abolished on 1 May 2026, and gas safety was never a Section 8 pressession grounds (Section 21 was abolished on 1 May 2026) and broken the law.
Expired EICR
It's a 5-year cycle. With multiple properties, it's genuinely hard to track without automation. Local authorities are now actively checking these.
Deposit protected late
The 30-day window feels generous until a new tenancy, a house move, a busy week at work, and suddenly it's day 35.
Right to Rent not followed up
If a tenant had time-limited right to rent status, you should have rechecked it. Did your spreadsheet remind you? Probably not.
The Real Cost of Spreadsheet Errors
Let's be specific about what poor tracking costs:
Most landlords who get fined are not cavalier about compliance. They just didn't have a system that actively caught problems before they became violations.
What Landlord Compliance Software Does Differently
A dedicated compliance tool like LetCompliance doesn't just store data, it acts on it:
Automatic reminders: You're notified 90, 30, 14, 7 and 1 day before any certificate expires, by email or SMS, not by you remembering to open a spreadsheet.
Live compliance score: Every property gets a 0 to 100 score updated daily. Open the app and in 3 seconds you know which properties need attention.
Section 8 readiness checker: The tool checks all compliance preconditions before confirming your grounds, so you know your claim will hold up.
Document vault: All certificates stored in one encrypted place, filed by property, type and date, with OCR that reads each certificate's expiry on upload. No more hunting through email archives.
Profitability calculator: Know your actual monthly net profit (or loss) per property, not just rent minus mortgage.
The Cost Comparison
LetCompliance Portfolio plan: £19/month (up to 10 properties)
Cost of one EICR fine: £30,000
Cost of one blocked Section 8 possession claim: £3,000 to £6,000
Monthly cost of LetCompliance for 5 years: £1,140
Fine avoided: £30,000
The spreadsheet that "costs nothing" ends up being the most expensive tool in your landlord toolkit.
The argument that changed everything: Making Tax Digital
A spreadsheet-versus-software debate written before 2026 was about convenience. It is not any more, because HMRC now dictates part of the answer.
Making Tax Digital for Income Tax requires landlords in scope to keep digital records and submit quarterly updates to HMRC, then a final declaration, instead of one annual return. The timetable:
Two things landlords get wrong. The threshold is on gross income, not profit, so a landlord with £52,000 of rent and a heavy mortgage is in scope despite thin profits. And a spreadsheet is not automatically compliant: records must be kept digitally and submitted through compatible software, so a spreadsheet needs bridging software sitting on top of it to file at all.
There is a lot of noise about this, so it is worth reading the MTD myths debunked and why generic accounting apps struggle with property before you buy anything.
You can make that work. But at that point you are running a spreadsheet plus a bridging tool plus whatever you use for compliance dates, which is three systems doing the job of one.
What actually breaks, and when
Spreadsheets do not fail dramatically. They degrade.
Version drift. The real one lives on a laptop. A copy goes to the accountant. Somebody edits the copy. Six months later nobody is sure which is current.
Single point of failure. It is on one device, maintained by one person. If that person is ill, on holiday or has left, the portfolio is opaque.
No audit trail. A spreadsheet records that a certificate exists. It does not record when you sent it to the tenant, or that the tenant received it. In a deposit dispute or a disrepair counterclaim, the second thing is the one that matters.
No evidence attached. The invoice, the photograph, the contractor's completion note and the email trail live in an inbox somewhere, not against the property.
It is passive. It shows you data when you open it. It does not act when you do not.
None of these is fatal on one property. All of them compound as you add doors.
The honest case for a spreadsheet
There is one, and pretending otherwise is why software comparisons are not trusted.
If you own one property, you live near it, there is no mortgage, the tenant has been there for years and your income is well under the MTD threshold, a spreadsheet plus a calendar is genuinely adequate. You will spend a few hours a year on it and nothing will go badly wrong.
The point at which it stops working is usually one of four: a second property, a tenancy that goes wrong, crossing the MTD threshold, or handing any of it to someone else. We have written separately on the signs it is time to switch, and on MTD when a letting agent collects your rent — the agent’s statement does not discharge your own reporting duty. Most landlords cross one of those without noticing, and only discover the spreadsheet was inadequate at the moment they need evidence.
The alternative, plainly: LetCompliance keeps the rent ledger, the expenses and the certificate dates in one record, and produces SA105-shaped figures with MTD quarterly summaries at year end. The columns you were maintaining by hand become a by-product. Free for your first property.
Frequently asked questions
Why are spreadsheets risky for landlord compliance?
Spreadsheets do not remind you before Gas Safety, EICR or EPC dates. One missed row can mean an expired certificate, a defeated Section 8 possession claim or a £30,000 electrical penalty. Purpose-built software tracks deadlines and evidence in one place.
What should landlords use instead of Excel for compliance?
Use a portfolio dashboard with per-property scores, document storage and email or SMS reminders at 90, 30, 14, 7 and 1 day before expiries, like LetCompliance, so nothing relies on memory.