Many landlords believe the difficult step is telling HMRC.
In reality, that’s where the process begins.
Once HMRC are aware, the focus shifts from deciding whether to deal with the situation… to understanding the full position and presenting it properly.
And that’s where many people feel uncertain.
Prefer to Watch Instead?
If you’d prefer to walk through this step by step, I’ve explained what happens after you tell HMRC in the video below. Video is available tomorrow
What “Telling HMRC” Actually Involves
When people say they are going to “tell HMRC”, it often sounds simple.
But in practice, it’s not just a notification.
It is a structured process.
HMRC will expect a clear and accurate breakdown of what has happened, not just a general explanation. This usually includes:
- when the property was first rented
- how much rental income was received
- what expenses were incurred
- how many years are affected
This is not about giving rough figures or estimates.
It’s about presenting a position that can be understood, reviewed, and supported if needed.
If you’re unsure whether anything has been reported at all, you may find this helpful: What happens if rental income was never reported
Why the Timeline Matters
One of the first things that needs to be established is the timeline.
Not just “I’ve been renting it out for a while” — but exactly when it started.
This matters because it determines:
- how many years need to be reviewed
- what records are required
- and how far back the position needs to be rebuilt
In many cases, this is where the first difficulty appears.
The further back you go, the harder it can be to pull everything together clearly.
If you’re unsure how far back HMRC can go, you can read more here: How many years back can HMRC check rental income?
What HMRC Will Expect From You
Once the process begins, HMRC are looking for a complete picture.
This typically means:
- full rental income figures for each year
- supporting records such as bank statements or letting agent statements
- a breakdown of allowable expenses
- confirmation of ownership and key dates
In simple terms, you are being asked to show what should have been reported in the first place.
And that requires more than just pulling a few numbers together.
Why Preparation Is More Important Than the Disclosure
A common misunderstanding is that the main step is “telling HMRC”.
In reality, the most important part is what sits behind that.
If the information is incomplete or unclear:
- it can lead to delays
- it can trigger further questions
- and it can make the process more difficult than it needs to be
Whereas a well-prepared position allows everything to be reviewed more smoothly.
So the focus should not just be on making the disclosure — but on making sure it is properly prepared.
What Happens After Submission
Once the information has been submitted, HMRC will review it.
This does not always result in an immediate response.
They may:
- accept the figures as presented
- ask follow-up questions
- request clarification
- or ask for additional supporting information
This is a normal part of the process.
But it reinforces the importance of clarity from the outset.
Because anything unclear is likely to come back as a question.
The Point Most Landlords Miss
One of the key changes in this situation is what happens once HMRC are involved.
Before that point, you are simply trying to understand your position.
After that point, you are working within a process.
There may be timelines.
There are expectations.
And you are no longer exploring your options freely — you are responding.
That shift matters more than most people realise.
Final Thought
Telling HMRC is often seen as the difficult step.
But in reality, it is the point where the process begins.
What matters most is understanding your position clearly before taking that step.
Because once the process starts, how well prepared you are will shape how smoothly it goes.
If you haven’t yet reviewed your position in detail, starting with a structured review can help you understand exactly where you stand before taking the next step. You can book a consultation below.