Moving Home With a Mortgage: What Porting Actually Means

You own a home, there’s a mortgage on it, and now you want to move. More space, less space, a new job, or a different part of the country, there are many potential reasons.

Which raises a question that never came up the first time you bought: what happens to the mortgage you’ve already got?

Most people have answered it in their own head before they speak to anybody. Either it comes with them, because it’s theirs and they’re keeping it. Or it ends the day they sell, and they start again from scratch. The reality usually sits between the two, and it goes by a name plenty of people have seen written down without anyone ever explaining it: porting.

It’s an ordinary thing to do, and it works out neatly for plenty of people. It’s worth understanding before you’re in the middle of a move, though.

What Porting a Mortgage Actually Means

Porting a mortgage means asking your current lender for a new mortgage on the property you’re buying, while keeping your existing deal on some or all of what you already owe. Subject to approval, the rate and the time left to run on it stay with the amount you port.

Two things worth knowing straight away. It stays with the lender you’re already with, so you can’t take your rate across to someone else. And although the word suggests something being lifted from one house and set down in another, what actually happens is a fresh application on a new property.

Worth a look at your paperwork, too. Plenty of products are described as portable, and people take real comfort from that word, but not every mortgage is, and when it is, it means the lender may allow it rather than guarantee it. Easy enough to check early.

Why Porting Usually Means Applying Again

Porting still involves an application. Income, outgoings, credit history, affordability, all of it gets looked at again, and the property you’re buying is valued and approved on its own merits.

That’s routine rather than anything to be nervous about, though it does mean the lender sees your circumstances as they stand today rather than when you first borrowed. A new job, a move into self-employment, a car on finance, another person in the household. We come across all of these regularly, and none of them automatically rules out porting, though each can affect the assessment or the evidence you’re asked to provide. Much easier to know where you stand before an offer goes in than after.

If You Need to Borrow More

Moving somewhere that costs a bit more is common, and it’s well catered for. The amount you port normally keeps its existing rate and end date, and anything extra usually goes onto a separate deal, whatever that lender has available at the time.

This leaves you with one mortgage split into two parts, possibly on different rates and maturing at different times. Perfectly normal, and just nicer to know now than to rediscover a couple of years later when one part ends, and the other carries merrily on.

If You’re Borrowing Less

Downsizing, or moving with a decent chunk of equity behind you, raises the opposite question.

If you’re repaying part of what you owe rather than carrying it all over, an early repayment charge may apply to the amount you’re repaying. This will depend on your product’s early repayment terms, any overpayment allowance it comes with, and how much of the balance isn’t coming with you. Some lenders view it differently when it happens alongside a port. It’s rarely a dealbreaker, but it’s a figure worth having in front of you early, because it changes what makes sense now and then.

Getting the Timing Right

Porting normally depends on your sale and your purchase completing together, or near enough to it.

Where a bigger gap opens up, the option can fall away. Sell up, move in with family for six months while you look, and there may be no mortgage left to port by the time you find somewhere. Where the sale completes first, the mortgage is normally repaid at that point, though some lenders will refund an early repayment charge if the purchase completes within a set window afterwards. Deadlines vary, so it’s worth checking.

None of it is hard to work around. It mostly comes down to asking early, because the sell-first or buy-first decision tends to get made for practical or emotional reasons long before anybody thinks about the mortgage.

Porting Isn’t Always the Right Route

For many homeowners, keeping the deal you’re on is clearly sensible. However, sometimes a different arrangement suits your circumstances better, even after accounting for any charge to leave early. It hinges on where you are in your term, how much you’re borrowing, and what’s available to you.

Plenty of conversations we’ve had began with someone certain they’d port and ended somewhere quite different. Others start the opposite way round. Both are good outcomes because the point is to land on the one that fits.

Where Advice Tends to Help

What makes moving home a little more involved isn’t any single element; it’s that the elements interact. The port, the additional borrowing, and a possible early repayment charge are two transactions that need to land at roughly the same moment. Adjust one, and the rest shift around it.

The lenders available to us don’t all take the same view on what they’ll port, how they treat the borrowing on top, or how much room they’ll allow between sale and purchase. Getting a sense of that early tends to make the whole move feel a good deal calmer.

What This Doesn’t Change

Already having a mortgage doesn’t guarantee the next one. A long run of on-time payments doesn’t, by itself, carry an application. Affordability is still assessed on where you stand today, and the property still has to meet the lender’s requirements.

We mention it gently because people moving for the second or third time often arrive with more confidence than first-time buyers, and it’s easy to make that assumption.

Where to Start

The most useful moment for this conversation is before you’ve found the house, while the answer still shapes what you decide, rather than landing on top of something already in motion. It tends to make the search easier, too, because you know what you’re working with.

If moving home is on your mind this year, we’re always happy to talk it through and look at where you stand.