When Your BTL Limited Company Runs Out of Losses – What Happens Next

My BTL company carried forward losses for three years. That part we knew was coming. What I had not fully reckoned with was how little would be left once it ended.

This is not a confession of recklessness. I went into our Bristol property knowing what the returns looked like. I understood that the yield was thin, that the mortgage was the dominant cost, that the company would take years to reach taxable profitability. I knew all of this. I still hoped that somehow the surplus would materialise faster, that the director loan would start coming back, that we would be in a position to reinvest sooner than the numbers actually permitted.

This is what positivity bias does. It does not make you ignore the data. It makes you trust it a little less than you trust your own optimism.

Cash flow positive is not the same as having money

Our company has been cash-flow positive from year one. Rent has covered the mortgage, the bills, the service charge, the maintenance, and the running costs of the company structure itself throughout. There is a surplus. It is just not a large one, and understanding why requires understanding how the mortgage is treated in the accounts.

Every month the company makes a mortgage payment. That payment has two components: interest, which is a deductible business expense and appears on the profit and loss, and capital repayment, which reduces the mortgage balance but is not a deductible expense. The capital repayment leaves the bank account every month but does not show up as a cost in the accounts. It is paying down a liability, not buying something.

This matters because it means the company’s cash position and its accounting profit are telling different stories. The bank account is smaller than the profit and loss suggests it should be, because a chunk of every mortgage payment is quietly reducing the mortgage rather than appearing anywhere on the P&L. If you want to see exactly what those numbers look like across three years of a real property company, the full breakdown of what it actually costs to run a BTL through a limited company shows the cash picture alongside the accounting one.

In year two our cash surplus was around £3,000. In year three, after the service charge was corrected by a new management company, it was closer to £900. The real steady state is probably somewhere between the two. Against that, a corporation tax bill of around £1,300 is coming. Not this year, but soon. The carried-forward losses that have sheltered us from tax are nearly exhausted.

When that bill arrives, the company will need to have the cash to pay it. Whether it does will depend entirely on what that year’s surplus looks like. It is not guaranteed.

How to see it coming in Xero

If you are filing your own CT600, you will have manually entered the carried-forward losses in box 285. That figure is your countdown. Each year the accounting profit reduces it. When it reaches zero, the full profit becomes taxable. The mechanics of filing limited company accounts in Xero, including why box 285 does not auto-populate and what happens if you miss it, are worth understanding before that moment arrives. 

You can track this by looking at your P&L each year and noting the operating profit figure. That is the amount eating into your loss reserve. When the cumulative total of those annual profits matches your carried-forward loss balance, the buffer is gone. I know roughly when that is for us. I know approximately what the bill will be. That visibility is only possible because I reconcile the books myself in Xero each year rather than waiting for a summary from someone else.

What contingency actually looks like

I joined the board of our building’s management company, which I do not especially enjoy. One of the things it gives me is early visibility of what is coming on the service charge. There is a hike on the horizon, and I know about it before it arrives.

Our options when it lands are limited. We will not be significantly increasing the rent, and that is a business decision as much as anything else. Our tenants have been with us since the beginning, two couples who live well together and look after the flat. Good tenants at that level of reliability are genuinely hard to find, and finding them yourself rather than through an agent is how you build the kind of relationship where this sort of arrangement is even possible. The cost of a void, referencing, and the uncertainty of who comes next would almost certainly outweigh a short-term rent reduction. When one of them faced the possibility of having to return to India due to a visa situation, we worked out an arrangement that meant the remaining tenants each contribute a little more and we absorb the rest, so that everyone can stay. The numbers work for the business and it is also the right thing to do. Those two things are not always in conflict.

The service charge increase will be absorbed elsewhere. We have a separate income stream from our loft, let during the summer months within the Rent a Room relief threshold, and we keep that money aside specifically for moments like this. It is not a formal emergency fund. It is just a small buffer that sits quietly until it is needed. That is what contingency planning actually looks like in a small portfolio, not a spreadsheet with scenarios, but a few decisions made in advance about what you will and will not do when the numbers get tighter, and something small set aside to make those decisions affordable.

What we know now and what we still do not

Whether this property was the right decision will only be clear over twenty or thirty years. That is what wealth building actually looks like. You make the best choice at the time with the information available. At the next stage you reinvest with what you know now, which is always more than you knew before. But you can never know everything. Markets crash. Housing markets stall. The only thing you can do is invest in the most logical way available to you at each point, and keep diversifying as you go, so that over a long enough time frame the overall picture is growth even if individual decisions turn out to be imperfect.

We chose property because we understood it, because leveraging bricks felt tangible and controllable in a way that equity markets did not at the time. With hindsight, the same capital in a global index tracker would have required less management, fewer service charges, and no tenants navigating visa applications. I think about that sometimes. We might yet get there. It is not either/or over a long investment horizon, it is sequencing, and each step teaches you something the next one benefits from.

The company is not a mistake. The equity is building. The tenants are good people and I value the relationship. But if you are going into a BTL limited company expecting the surplus to fund your next move in the short term, look again at your numbers. Not just to check they add up, but to check whether the story you are telling yourself about them is the same story they are actually telling. The director loan sitting on your balance sheet will tell you a lot about how long that wait actually is. Xero will show you where you are. Trust the numbers more than you trust your optimism. And build the contingency before you need it.

This article reflects my personal experience and financial position. It is not financial or tax advice. Property investment involves risk and individual circumstances vary.