Spreadsheet vs Compliance Software UK 2026

The Spreadsheet Problem

Plenty of UK landlords run their lets from a spreadsheet: the properties, the certificate dates, the tenants, the rent in and the costs out. 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. The check is due every 12 months. You're busy. The date slips past. Missing the annual gas safety check is a criminal offence, and the fine is unlimited. It used to stop you serving a Section 21 notice too. Section 21 ended on 1 May 2026; the offence didn't.

Expired EICR

It's a 5-year cycle. With multiple properties, it's genuinely hard to track without automation.

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:

• EICR non-compliance fine: Up to £40,000
• Right to Rent penalty: Up to £10,000 per occupier (first breach), up to £20,000 (repeat)
• Possession on hold: while a deposit is unprotected, or the deposit paperwork (the Prescribed Information) was never given, the court cannot make a possession order on most grounds (Housing Act 2004, section 215), and the arrears keep growing until it is put right
• Deposit protected late or not at all: the court must order 1 to 3 times the deposit (Housing Act 2004, section 214)
• Unlicensed HMO fine: Unlimited + Rent Repayment Order (up to two years’ rent for offences from 1 May 2026)

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 Software Does Differently

Software like LetCompliance doesn't just store the data. It acts on it:

Automatic reminders: You're told 90, 30, 14, 7 and 1 day before any certificate expires, by email (or by text on a paid plan), instead of relying on you 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 notice builder: Choose the grounds and it writes the Schedule 2 wording, works out the notice period and checks the Ground 8 arrears threshold against your rent ledger.

Document vault: All certificates stored in one encrypted place, filed by property, type and date, and each certificate's expiry date is read off it when you upload it. 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 a month (up to 10 properties)

Five years of it: £1,140

One EICR penalty: up to £40,000

One deposit protected late: 1 to 3 times the deposit, and no possession order on most grounds until it is protected with the prescribed information given

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:

• From April 2026: gross property (plus self-employment) income above £50,000. Live now.
• From April 2027: above £30,000.
• From April 2028: above £20,000.

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. There’s more on the signs it is time to switch, and on MTD when a letting agent collects your rent: the agent’s statement doesn’t do your reporting for you. 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, sends your Making Tax Digital quarterly updates to HMRC (it's recognised by HMRC for UK property income) and gives you SA105-shaped figures at year end. The columns you were keeping by hand become a by-product. Free for your first property, Making Tax Digital included.