Porting a Mortgage with Bad Credit

You've got a good mortgage rate and you want to move house. Porting — transferring your existing mortgage deal to a new property — seems like the obvious answer. But if your credit has deteriorated since you took out the mortgage, porting isn't the straightforward process you might expect.

What Is Porting?

Porting allows you to take your existing mortgage deal — including the interest rate, remaining term, and any special conditions — and apply it to a new property. Instead of paying early repayment charges (ERCs) to exit your current deal and then taking a new mortgage, you simply move the deal with you.

Most fixed-rate and tracker mortgages include a porting option in their terms. But here's the crucial detail: porting is not a right, it's a re-application.

Why Porting Matters Financially

The financial incentive to port can be significant. If you're on a 3.5% fixed rate and current rates are 5%, giving up your existing deal means paying more for the same mortgage amount. On a £200,000 mortgage, the difference between 3.5% and 5% is approximately £175/month or £2,100/year. Over the remaining 2-3 years of a fix, that's £4,200-£6,300 in extra interest — plus any early repayment charges you'd pay to exit the current deal.

Why Lenders Reassess You

When you port, the lender treats it as a new mortgage application on a new property. They need to assess:

• Your current creditworthiness — not what it was when you first applied
• The new property — is it suitable security?
• Affordability — can you still afford the mortgage based on current circumstances?
• The new loan-to-value ratio — does the mortgage work against the new property's value?

This means if your credit has worsened since your original application, the lender can decline the port even though you've been paying your existing mortgage perfectly.

Common Reasons Porting Is Declined

Understanding why porting applications fail helps you assess your own chances and prepare accordingly.

New Adverse Credit

If you've acquired defaults, CCJs, missed payments, or other adverse credit since your original application, your lender may decline the port. Even if you've never missed a mortgage payment, other credit issues affect their assessment. The lender's scoring model doesn't distinguish between "responsible mortgage payer who had one financial mishap" and "generally risky borrower" — it sees the adverse credit and applies the same rules.

Affordability Changes

If your income has decreased, your debts have increased, or you're now self-employed when you were previously employed, the affordability calculation may no longer work.

The New Property

The lender might not like the new property — non-standard construction, short lease, unfavourable location, or a valuation that doesn't support the mortgage amount.

Changed Lending Criteria

Lenders update their criteria regularly. Even if your circumstances haven't changed, the lender's rules might have. A credit score that was acceptable three years ago might not meet today's threshold.

What Happens If Porting Is Declined?

This puts you in a difficult position:

Option 1: Stay Put

If you can't port and don't want to pay ERCs, you could decide not to move. Not ideal, but sometimes the financially sensible choice.

Option 2: Pay the ERCs and Get a New Mortgage

If your deal has early repayment charges, you'll need to pay them. ERCs are typically 1-5% of the mortgage balance. On a £200,000 mortgage, that could be £2,000-£10,000. You'd then take out a new mortgage — potentially with a specialist lender if your credit is the issue.

Option 3: Wait for the Deal to End

If your fixed rate or deal period ends soon, you could wait. Once you're on the lender's SVR (standard variable rate), there are usually no ERCs. You can then move and get a new mortgage without penalty.

Option 4: Negotiate with the Lender

Sometimes a conversation helps. If the issue is borderline, your lender's retention team may have more flexibility than the initial assessment suggests. Explain your situation, emphasise your perfect payment record, and ask if they'll reconsider.

Porting When You Need to Borrow More

If you're moving to a more expensive property, you'll likely need additional borrowing on top of what you're porting. Most lenders allow this but treat it as two parts:

1. The ported amount — at your existing rate
2. The additional borrowing — at a new rate, based on current affordability and credit assessment

The additional borrowing is a completely new application. If your credit has issues, you might be able to port the original amount but be declined for the extra borrowing. In this case, you'd need a second charge mortgage or to find the additional funds elsewhere.

Alternatives to Porting

Remortgaging to a Specialist Lender

If your credit has deteriorated, a specialist lender like Kensington, Pepper Money, or Aldermore may accept you for a full remortgage on the new property. The rate will likely be higher than your current deal, but at least you can move.

Product Transfer (If Staying Put)

If porting fails and you decide to stay in your current property, you can often do a product transfer when your deal ends — moving to a new rate with your existing lender without a full credit reassessment. This keeps you on a competitive rate even with adverse credit.

Selling and Renting Temporarily

If your credit issues are temporary (recent defaults that will age, an IVA nearing completion), it might make sense to sell, rent for a year or two while your credit improves, then buy again with better rates and more options.

Improving Your Chances of Porting

If you know you want to move and need to port:

1. Check your credit reports well in advance — fix any errors
2. Pay down debts to improve your debt-to-income ratio
3. Maintain perfect payments on your existing mortgage
4. Talk to your lender early — get an informal indication before finding a property
5. Use a broker — they can assess whether porting is realistic or whether you need a Plan B

Real-World Porting Scenarios

Scenario 1: The Minor Credit Blip

Claire, 38, has a 3-year fixed rate at 3.8% with Halifax. She wants to move to a bigger house. Since taking the mortgage, she missed one credit card payment 18 months ago (she was in hospital and forgot). Her application to port is initially flagged by Halifax's automated system, but when it goes to a human underwriter, they note her otherwise perfect payment history on the mortgage itself and approve the port.

Lesson: A single minor credit issue doesn't always block porting. If your mortgage payment record with that lender is perfect, push for human review.

Scenario 2: The Failed Port, Successful Alternative

Mark and Sara have a 5-year fix at 3.2% with Nationwide, with 2 years remaining. Since taking the mortgage, Mark was made redundant and took a lower-paying job, plus they have a CCJ from an old disputed phone contract. Nationwide declines the port.

Their options: Pay the ERC (3% on £195,000 = £5,850) and get a new mortgage with a specialist lender at 5.5%, or wait 2 years for the fix to end. Their broker runs the numbers:

• ERC + specialist rate: £5,850 upfront, then £1,150/month at 5.5%
• Stay put for 2 years, then move: No ERC, but no new home for 2 years
• Move now and go onto SVR with new lender: Higher monthly cost

They decide to wait 18 months (ERC drops to 1%), then move with a specialist lender.

Lesson: Sometimes the right answer is patience. The ERC schedule matters enormously.

Scenario 3: Partial Port Success

Dave has a £220,000 mortgage at 3.5% and wants to buy a £350,000 property, porting his current mortgage and borrowing an extra £80,000. His lender agrees to port the £220,000 (his mortgage payment record is perfect) but declines the additional £80,000 because of a recently satisfied default.

Dave's broker arranges a £80,000 second charge mortgage with a specialist lender at 6.2%. His overall position: £220,000 at 3.5% + £80,000 at 6.2%. The blended rate (approximately 4.1%) is much better than remortgaging the whole amount with a specialist lender at 5.5%.

Lesson: Partial porting with a second charge for additional borrowing can be a creative and cost-effective solution.

Questions to Ask Your Lender About Porting

1. "Does my mortgage allow porting?" — Check your mortgage terms or ask directly
2. "Will porting require a full credit check?" — Almost certainly yes, but understand what they'll assess
3. "Can I get an informal indication of whether I'd pass before committing?" — Some lenders will give preliminary guidance
4. "What happens to my deal if I port part of the balance and take additional borrowing?" — Understand whether the ported amount keeps its rate
5. "If porting fails, will the credit search affect my ability to get a mortgage elsewhere?" — One search is fine; understand the timeline before applying elsewhere
6. "What's my exact ERC schedule?" — Know the cost of Plan B before you need it

Step-by-Step Guide to Attempting a Port

1. Check your mortgage terms — confirm porting is included as an option
2. Check your credit reports — know what the lender will see before they see it
3. Contact your lender early — before you find a property, get informal guidance on whether porting is realistic
4. Get a broker assessment — even if you plan to port, a broker can assess whether porting makes sense or whether a new mortgage (with or without ERCs) is cheaper overall
5. Find your property — only commit to a purchase once you have reasonable confidence the port will succeed
6. Submit the porting application — provide all required documentation promptly
7. Have a Plan B ready — know your ERC, know which specialist lenders your broker would approach, and know the approximate cost of the alternative
8. If approved: Proceed with the move as normal, with your existing rate transferring to the new property
9. If declined: Don't panic. Assess Plan B calmly, with your broker's guidance

The Bigger Picture

Porting is designed to reward loyal customers, but it's not a guaranteed right. If your credit has changed, approach the process with realistic expectations and have a backup plan. A declined port isn't the end of your moving plans — it just means the route needs to be different.

This is educational content, not financial advice. Your situation is unique — speak to a qualified mortgage broker before making any decisions.