The flagship · on your device
Disclosure Preparation Workbench
The one tool that pulls it all together — rebuild a complete, evidenced record for every property and every year.
If HMRC ever asks you to prove your rental figures, this is where you build the answer — a complete, year-by-year record you can stand behind, for every property. It runs entirely on your own device; nothing you type is sent anywhere or saved by us, and Save my work keeps a file on your own computer so you can come back to it.
Rebuild a complete, evidenced record for every property and every year — from acquisition to today. Enter each figure once, grade how well you can prove it, and the Workbench builds the working paper and hands the totals to the Liability Estimator. It documents your stated basis for a figure; it never invents one.
New to this? Here’s how it works, in plain English — tap to open
Don’t worry if it looks like a lot — you go one step at a time, and you can save and come back whenever you like.
- Add your property (or properties). Just the name, your share, and when you bought it.
- Fill in the figures, year by year. What rent came in, and what you spent (repairs, insurance, agent fees, and so on). Enter each number once.
- Grade how sure you are of each figure. This is the clever bit, and it’s simple:
- Documented — you have the paperwork (a receipt, an invoice).
- Corroborated — you don’t have the exact receipt, but something backs it up (like a bank statement showing the payment).
- Estimated — it’s your honest best guess, with no paperwork yet.
- Check your gaps, then see the summary. The tool shows you where your records are thin, then totals it all up.
The four tabs, in plain English:
- Records — where you type it all in: each property, and the rent and costs for every year.
- Gap map — a simple picture of how complete your records are, so you can see at a glance which years or figures still need work.
- Find the sources — a checklist of where to dig out the paperwork you’re missing (old bank statements, agent statements, and so on).
- Summary & export — the totals, all added up, ready to save or print — the finished record you take into your disclosure.
You cannot get it “wrong” here. This is your private workspace to get organised — nothing is sent anywhere, and nothing is filed until you decide.
What the Workbench does, and who it’s for
If you need to work out undeclared rental income going back over several years, this is your landlord disclosure spreadsheet — a structured way to rebuild a complete, evidenced record for every property and every tax year. It’s built for a landlord getting ready for the Let Property Campaign or another HMRC disclosure, and it does the heavy lifting of landlord tax record-keeping in one place.
- Every figure, against the real return. Rent and each allowable cost map to the actual Self Assessment property boxes (SA105), so what you build lines up with what HMRC expects.
- Grade your proof. Mark each figure as documented, corroborated or estimated — and that grade travels into the calculation, so an estimate is never dressed up as a proven fact. This is exactly what supports a “reasonable care” position.
- See your gaps. The gap map shows, at a glance, where your records are thin — so you know what to hunt for before you disclose.
- It hands the totals on. Your net figures feed the Liability Estimator, so you can see the rough tax before you commit.
How the Workbench saves you money
- You claim everything you’re entitled to. Going through every cost, year by year, means you don’t forget allowable expenses — insurance, agent fees, repairs — which lowers the tax, and the penalty with it. (Or, if your costs are small, the £1,000 property allowance may beat claiming them — you take one or the other, not both.)
- You come forward first. A prepared, unprompted disclosure almost always beats waiting for HMRC to find you — the single biggest saving in your control.
- You do it yourself. Reconstructing years of records is the expensive part when an accountant does it. Here, you do the groundwork from a position of strength — never dependent out of fear or confusion — and pay for help only where it genuinely earns its fee, for the hard parts or a final check. The one exception is a serious case (deliberate behaviour, or anything flagged as needing a specialist): there, get help first.
A quick example (illustrative)
Figures and people are hypothetical, to show the shape of it.
Meera let one flat for six years and never declared it — a careless oversight, not deliberate. She was dreading paying an accountant to rebuild it all. Instead she used the Workbench: she entered each year’s rent and costs, and graded them — most were documented (bank statements, agent statements), a few older repairs were honest estimates. Going through it properly, she found agent fees and insurance she’d have forgotten, which cut the taxable profit. Because she came forward voluntarily with a complete, well-evidenced record, her disclosure supported a careless, unprompted position — a penalty near the bottom of the range, not the 15–30% she’d have faced if HMRC had found her first. The groundwork she did herself; she only needed a short professional check at the end.
Everything runs on your own device and nothing is sent anywhere. We’re based in Hounslow, west London, and help landlords across the UK — if you’d rather have a hand, talk to us.