MTD Software: Purpose-Built Landlord vs Generic Accounting App

If you’re picking software for Making Tax Digital, you aren’t hunting for one best product. You’re choosing between two kinds of tool:

• General accounting apps: Xero, QuickBooks and Sage. Built for small businesses of all kinds, with powerful ledgers; property reporting depends on how you set them up. FreeAgent sits between the two: a general package with a landlord account that fills in the SA105 pages and applies the finance-cost relief.
• Purpose-built landlord tools, LetCompliance among them. Built for UK residential landlords. Know about tenancies, deposits, Section 24, replacement of domestic items, EPCs. Weaker for other business income.

Many products in both categories can send MTD ITSA quarterly updates and the tax return; GOV.UK’s software list shows what each one supports. The choice is which one saves you time and stops you making tax errors.

Not tax advice. Take advice on your own portfolio. Software preference is subjective; tax-return accuracy is not.

What generic accounting apps do well

Xero, QuickBooks, Sage are mature accounting platforms with hundreds of thousands of UK users across every kind of small business. Their strengths:

• Bank feeds are mature. Every major UK bank connects reliably; transactions import automatically.
• Chart of accounts is flexible. You can code anything into any category, if you know how.
• Multi-business accounting. A landlord who also runs a consultancy, a shop or an e-commerce store can put everything in one platform.
• Third-party integrations. Stripe, PayPal, Shopify and the Xero apps marketplace give you hundreds of connectors.
• Accountant ecosystem. Every UK accountant knows Xero and QuickBooks. Handing over your file at year-end is trivial.
• Multi-currency, payroll, VAT. If your landlord business is really a small business with staff and VAT, these features matter.

For a landlord who is also a self-employed professional, running everything in one Xero account is genuinely simpler than juggling a Xero for consultancy + Hammock for properties.

Where generic apps fall short for landlords

The risk is that a general ledger leaves the property rules to you. Unless your app or your set-up handles them, these are yours to get right:

1. Section 24 finance-cost restriction.

Mortgage interest isn’t a deductible expense for individual landlords. It’s a 20% tax credit at the final declaration (22% from 2027-28, and limited to the lowest of finance costs, property profits and adjusted total income). A general ledger will let you code mortgage interest as an expense and deduct it against rental profit, which is the wrong tax treatment. You have to know the rule and code it correctly, or your accountant does it at year-end (paying for their time).

2. Replacement of Domestic Items relief.

Buying a £600 fridge to replace an old one is a claimable expense. Buying it as the first fridge in a newly-let property is capital (not currently deductible). A ledger cannot tell whether an item replaced an old one, so the coding is yours.

3. Mileage at HMRC's simplified rates.

Landlords can claim mileage at HMRC-approved rates. Without a mileage log in the app, you track the miles, apply the 10,000-mile tier and keep the log HMRC wants on enquiry yourself.

4. Per-property P&L.

Under MTD, all UK residential property income can be reported as one "property business". HMRC does not require per-property returns. But you benefit from per-property P&L for management purposes (which property is losing money? which needs a rent review?). General ledgers let you tag transactions by "class" or "project", but it takes work to set up.

5. Deposit money separate from rent.

A tenant deposit is not your money. It’s protected in a scheme. Received in your bank account, it must be protected in an approved scheme, with the prescribed information given, within 30 days (only a custodial scheme takes the money). In a general ledger a deposit and a rent payment look alike; you have to code them right or they show as income.

6. Compliance deadlines.

Gas Safety expiring, EICR renewal, EPC below MEES. Tracking compliance calendars is outside what accounting software is for.

7. Section 8 / Section 13 / statutory forms.

Not an accounting question, but where MTD software becomes "landlord software" you get the tenancy management side too.

What purpose-built landlord apps do well

Purpose-built landlord apps, LetCompliance among them, are built specifically for UK residential landlords. Their strengths:

• Property-first data model. Tenancy start and end, rent amount, deposit scheme, EPC rating and compliance dates are all first-class fields.
• UK tax categories mapped to SA105. The Self Assessment property pages have specific boxes. Purpose-built apps map transactions directly to those boxes.
• Section 24 and Replacement of Domestic Items handled automatically. Mortgage interest tagged as "finance cost" becomes the 20% credit (22% from 2027-28, and limited to the lowest of finance costs, property profits and adjusted total income), not a deduction. Replacement items are separated from first-time provision.
• Mileage at HMRC rates. With log format ready for enquiry.
• Compliance calendar. Gas safety expiry, EICR renewal, EPC and deposit renewal sit on the same platform.
• Tenant portal. Not a MTD feature, but a landlord workflow feature many landlords want.
• Rent tracking, arrears alerts, Section 8 evidence. Bookkeeping doesn’t sit apart from the tenancy: it is the tenancy.

For a landlord whose only income is property, purpose-built apps make the whole job smaller.

Where purpose-built apps fall short

1. Other business income.

Self-employed? Consultancy? E-commerce? Purpose-built landlord apps mostly cannot handle non-property income. You need a separate tool.

2. Multi-entity accounting.

Corporate landlord with a UK company, VAT-registered? Purpose-built apps are usually individual-focused. Sage or Xero handles corporate accounting better.

3. Full-fat P&L reports.

Generic apps produce full audit trails, month-end reports, budget-vs-actual variance analysis. Purpose-built apps focus on the numbers HMRC wants: rent received, expenses by category, tax due. Beyond that, they’re thinner.

4. Accountant familiarity.

Not every accountant has used Hammock. If your accountant already prefers Xero and refuses to work with anything else, the software choice may be made for you.

The middle path: bridging

Some landlords run both: a purpose-built app for compliance and tenancy workflow, a generic ledger or accountant for filing.

LetCompliance covers both ends for UK property income. It tracks compliance, tenancies, rent, expenses and mileage, keeps the figures in MTD shape (SA105 category totals, Section 24 finance costs separated, replacement of domestic items separated) and sends your MTD quarterly updates to HMRC. You can also export the same figures to your accountant.

That is its scope: UK property income. It can submit your final declaration when UK property is the only income you need to add yourself. If your return also needs self-employment, foreign property, savings or dividend income, you finalise that year with software that can add it, or with your accountant.

The bridging model works when:

• You want property-specific accuracy (get all the reliefs right)
• You have an accountant relationship anyway
• You don’t want to learn Xero for one property

The bridging model doesn’t work when:

• You want a single ledger for property and non-property income
• You have multiple business income streams (property + freelance)

Decision framework

Simple flowchart:

Are you only a landlord (no other business income)?

• Yes → purpose-built app is usually the right answer.
• No → generic app in the driver’s seat, purpose-built as a bridge if you value the compliance workflow.

Do you file your own tax return without an accountant?

• Yes → your MTD software must also submit to HMRC via API. Confirm your chosen tool is on the recognised submission list, not just "MTD-compatible" for data purposes.
• No → any tool that generates the right data can be an input to your accountant’s process; they submit.

Do you have 10+ properties?

• Yes → the compliance calendar of a purpose-built app pays for itself. Section 24 handling and per-property P&L stop the year-end errors that cost most.
• No → simpler portfolio, either category works.

Are you in Scotland or Wales?

• Scotland: devolved rates and PRS rules. Check your software handles Scottish Rate of Income Tax. Most do; some don’t.
• Wales: mirrors England for income tax; Land Transaction Tax replaces SDLT.

LetCompliance is built for UK residential landlords with 1 to 100 properties, individual or agency. The tenancy, the rent ledger, the certificate dates and the profit and loss for each property sit in one place, so the tax figures come out of the letting you already run. Its SA105 tax pack works with any accountant, and it sends MTD quarterly updates for UK property income (recognised by HMRC). If your return also needs self-employment, savings or dividend income, finalise the year with software that can add it, or with your accountant.

Sources

• HMRC: Recognised MTD ITSA software list
• HMRC: Property income manual (PIM)
• GOV.UK: Making Tax Digital for Income Tax: overview