5 Mortgage Costs You Might Not Know

Published 21 October 2026

The below article has information contained within that was correct at the time of publication but is subject to change. This is for information purposes only and does not constitute advice.

5 Mortgage Costs You Might Not Know

Written by Doug Miller, Director at Lansdown Financial Services.

Doug Miller is a mortgage broker and co-founder of Lansdown Financial Services, based in Bath, quoted in 30+ news articles including the Guardian, Sky News, This is Money and the Sun.

When you’re looking for a mortgage, it’s tempting to concentrate on finding the lowest interest rate.

But the mortgage with the lowest rate isn’t always the one that will cost you the least.

Mortgage product fees, property valuations, legal costs and early repayment charges can all affect the overall amount you pay. Some lenders also offer incentives such as cashback or free valuations, which need to be factored into the comparison.

Two mortgage products might look almost identical at first glance, but once you account for the fees, one could work out considerably cheaper than the other.

That’s why, at Lansdown Financial Services, we don’t recommend mortgages based purely on the headline interest rate.

Here are five mortgage costs worth understanding before choosing your next deal.

Key Points: The Short Version

Don’t have time to read the full article? Here are the five mortgage costs you need to know about.

• 1. Mortgage product fees: Some mortgages have no arrangement fee, while others can charge £1,000, £2,000 or more. A lower interest rate doesn’t always justify a higher fee.
• 2. Mortgage valuation and survey costs: Your lender may charge for its valuation, and you may also want an independent survey to assess the property’s condition.
• 3. Solicitor and conveyancing costs: Buying a home involves legal work, property searches and other charges. Switching mortgage lenders can also involve legal costs.
• 4. Early repayment charges: Leaving a mortgage deal early or exceeding an overpayment allowance could result in charges running into thousands of pounds.
• 5. Mortgage exit and administration fees: Some lenders charge additional fees when you repay or close your mortgage account.

The bottom line: Don’t choose a mortgage based solely on its interest rate. Compare the overall cost, including fees, incentives and any restrictions that could affect your future plans.

---

The Full Guide: Five Mortgage Costs Explained

Want to understand the detail? Below, we explain each of the five costs, when you might need to pay them and what to consider when comparing mortgage products.

In This Guide

• Mortgage arrangement and product fees
• Property valuations and surveys
• Solicitor and conveyancing costs
• Early repayment charges
• Mortgage exit and administration fees
• Mortgage broker fees
• Cashback and other lender incentives
• How to compare the true cost of mortgages
• Frequently asked questions

1. Mortgage Product and Arrangement Fees

One of the first costs to check when comparing mortgages is the product fee, sometimes called an arrangement fee.

Some mortgage products don’t charge a product fee at all.

Others may charge £1,000, £2,000 or potentially more.

So why would someone choose a mortgage with a £2,000 arrangement fee when another mortgage has no fee?

Usually, it’s because the mortgage with the fee offers a lower interest rate.

Whether paying that fee makes financial sense depends on the mortgage amount, interest rate difference and length of the deal.

Is a Mortgage with No Product Fee Better?

Not necessarily.

Imagine you’re comparing two mortgage products.

Feature	Mortgage A	Mortgage B
Interest rate	4.50%	4.65%
Product fee	£1,999	£0
Initial fixed period	2 years	2 years
Main attraction	Lower interest rate	No arrangement fee

Illustrative mortgage products, not current lending offers.

Mortgage A has the lower interest rate, but you’d need to account for its £1,999 product fee.

Mortgage B has a slightly higher rate but no product fee.

Which is cheaper?

That depends on how much you’re borrowing and the repayments and outstanding balance under each product.

On a larger mortgage, the interest saving from the lower rate could outweigh the product fee.

On a smaller mortgage, paying the fee might not be worthwhile.

This is why we’d compare the total cost rather than automatically recommending the lowest advertised interest rate.

Can You Add a Mortgage Product Fee to Your Loan?

Often, yes.

Many lenders allow borrowers to add the product fee to the mortgage rather than paying it upfront.

This can be useful if you’d prefer to keep more of your savings available for other expenses.

However, there’s an important consideration.

If you add a £1,999 product fee to your mortgage, you’re borrowing an additional £1,999.

Unless you repay it separately, you’ll also pay interest on that amount.

Depending on the mortgage term, that could increase the overall cost.

Whether to pay the fee upfront or add it to your mortgage depends on your circumstances, available savings and the lender’s requirements.

2. Mortgage Valuation and Property Survey Costs

Before agreeing to lend money against a property, a mortgage lender needs to establish that the property provides acceptable security for the loan.

This is where the mortgage valuation comes in.

Some mortgage products include a free basic valuation, while others may require you to pay for it.

The cost depends on the lender, property and type of valuation required.

Is a Mortgage Valuation the Same as a Property Survey?

No. A mortgage valuation is primarily for the lender, not a detailed assessment of the property’s condition for the buyer.

A lender may assess the property through an automated valuation, a remote assessment or a physical inspection.

However, the valuation isn’t necessarily designed to identify problems with the roof, electrical installations, plumbing or structure.

If you’re buying a property, you may want a separate survey to help assess its condition.

That can involve an additional cost, but it may also highlight problems that could be expensive to repair after you’ve moved in.

What Happens If the Lender Values the Property Below Your Offer?

This is commonly called a downvaluation.

For example, imagine you’ve agreed to buy a property for £300,000, but the lender values it at £285,000.

That difference could affect how much the lender is prepared to advance.

If you’re buying with a relatively large deposit, you may have sufficient flexibility to proceed.

But if you’re relying on a 95% mortgage, a lower valuation could mean needing additional deposit funds or renegotiating the purchase price.

Although this isn’t technically a mortgage fee, it’s a potential financial complication worth understanding before committing to a purchase.

3. Solicitor and Conveyancing Costs

Buying a property involves legal work, and you’ll normally need a solicitor or licensed conveyancer to handle the transaction.

Your conveyancer will deal with matters including the legal title, property searches, contracts and transfer of funds.

However, their bill may include more than just the professional fee for their time.

There can also be additional charges known as disbursements.

These can include property searches and Land Registry fees.

What Legal Costs Should You Budget For?

Cost	What it covers
Conveyancing fee	The solicitor’s or conveyancer’s professional work.
Property searches	Checks relating to the property and surrounding area.
Land Registry charges	Relevant registration costs.
Bank transfer fees	Transferring purchase funds where charges apply.
Leasehold-related costs	Additional enquiries, notices and documentation where applicable.

The exact costs will depend on the property, location and complexity of the transaction.

It’s worth obtaining a clear quotation that explains what’s included and which additional charges may apply.

Do You Pay Legal Fees When Remortgaging?

Potentially, yes.

If you’re switching to a different mortgage lender, legal work will normally be required to repay the existing mortgage and register the new lender’s security.

However, some remortgage products include standard legal services or offer cashback towards the cost.

If you’re simply changing mortgage products with your existing lender, the process may be more straightforward and equivalent conveyancing work is often unnecessary.

This is another reason why comparing mortgage products based solely on the interest rate can be misleading.

A slightly higher-rate product that includes legal services and a free valuation could potentially work out cheaper overall.

4. Early Repayment Charges

Early repayment charges, commonly called ERCs, are among the most important potential mortgage costs to understand.

An ERC may apply if you repay your mortgage, switch to another lender or make overpayments exceeding the permitted allowance during a charging period.

These charges are particularly common with fixed-rate mortgages.

They can also apply to certain other mortgage products.

How Much Can an Early Repayment Charge Cost?

An ERC is often calculated as a percentage of the outstanding mortgage balance.

For example:

Outstanding mortgage	Early repayment charge	Potential cost
£150,000	2%	£3,000
£200,000	2%	£4,000
£250,000	2%	£5,000
£300,000	3%	£9,000

Illustrative examples. Actual ERC calculations depend on the mortgage terms, relevant balance and charging structure.

A 2% charge on a £250,000 outstanding mortgage would cost £5,000.

That’s a significant expense if you need to leave the mortgage earlier than expected.

What If You Want to Move Home?

Many mortgage products are portable, meaning you may be able to apply to transfer your existing mortgage product to another property.

However, porting isn’t automatically guaranteed.

You’ll normally need to meet the lender’s affordability and eligibility requirements, and the new property must be acceptable.

If you can’t port your mortgage and need to repay it during the ERC period, a charge may apply.

That’s why we’d ask about your future plans before recommending a particular mortgage deal.

If you think you’re likely to move within the next few years, a longer fixed-rate product with substantial exit charges may not be the most suitable option.

What If You Want to Make Mortgage Overpayments?

Many mortgages permit overpayments up to a specified amount without triggering an ERC.

However, the allowance and how it’s calculated vary between lenders and products.

For example, some lenders base their annual allowance on a particular mortgage balance, while others use different calculation methods.

If you’re expecting a large bonus, inheritance or other lump sum that you might use towards your mortgage, it’s worth discussing this before choosing a product.

A competitive interest rate isn’t necessarily good value if the mortgage doesn’t provide the flexibility you need.

5. Mortgage Exit and Administration Fees

Some lenders charge fees when you eventually repay or close your mortgage.

These may be described as mortgage exit fees, redemption administration fees, account closure fees or similar terms.

They’re separate from early repayment charges.

An ERC generally relates to repaying or leaving a mortgage during a specified charging period.

An exit or administration fee may relate to closing the mortgage account or processing the redemption.

Not every lender charges these fees, and the amount varies.

How Do You Know If You’ll Pay an Exit Fee?

Your mortgage documentation should explain the relevant charges.

If you’re remortgaging, your existing lender will normally provide a redemption statement setting out the amount required to repay the mortgage, including any applicable fees.

Although these costs may be relatively small compared with an arrangement fee or ERC, they’re still worth including when comparing the overall cost of switching mortgages.

What About Mortgage Broker Fees?

Mortgage broker fees are another potential cost worth checking before arranging your mortgage.

Some mortgage advisers charge a fee for their advice or mortgage arrangement services.

Others receive payment from the lender when a mortgage completes, without charging the client a separate broker fee.

At Lansdown Financial Services, our mortgage advice is free.

We don’t charge our clients a separate broker fee for our mortgage advice.

That means you can speak to us about your mortgage requirements, understand the available options and receive personalised mortgage advice without paying us a broker fee.

You may still need to pay fees charged by the mortgage lender or other professionals involved in the transaction.

We’ll explain the relevant mortgage costs before you decide whether to proceed.

Don’t Forget the Other Costs of Buying a Home

If you’re purchasing a property rather than remortgaging, the mortgage is only part of the overall expense.

You’ll also need to budget for the deposit and potentially Stamp Duty Land Tax, or the equivalent property transaction tax depending on where you’re buying.

Moving costs, insurance, furniture, decorating and unexpected repairs should also be considered.

This is particularly important for first-time buyers.

Although putting more money into your deposit may improve the mortgage products available, we’d be cautious about using every penny you’ve saved without considering what happens after completion.

Keeping some savings available for unexpected costs can be valuable.

Is the Mortgage with the Lowest Interest Rate Always the Cheapest?

No. The lowest mortgage interest rate doesn’t automatically mean the lowest overall cost.

A mortgage with a lower rate may carry a substantial product fee.

Another could have a slightly higher rate but include cashback, free legal services or a free valuation.

To understand which is more cost-effective, you need to compare the full mortgage package.

Mortgage Costs Comparison Checklist

What to compare	Why it matters
Interest rate	Affects your mortgage repayments and interest cost.
Product fee	Can increase the overall cost, particularly on smaller mortgages.
Monthly repayment	Needs to remain comfortable within your budget.
Valuation and legal costs	May be payable separately or included as an incentive.
Cashback	Can reduce the effective cost of a mortgage deal.
Early repayment charges	Important if you may move, refinance or repay early.
Overpayment allowance	Determines how much flexibility you have to reduce the balance without charges.
Overall cost	Provides a more meaningful comparison than the headline rate alone.

For example, a mortgage offering £500 cashback might initially look attractive.

But if another suitable mortgage saves substantially more through a lower interest rate or reduced product fees, the cashback may not represent the best overall value.

It’s also worth comparing products over an appropriate period, such as the initial fixed-rate term, while considering the outstanding mortgage balance at the end of that period.

This is where professional mortgage advice can be particularly useful.

Frequently Asked Questions About Mortgage Costs

What Is the Biggest Hidden Mortgage Cost?

It depends on the mortgage, but early repayment charges can be particularly significant.

If you need to repay a mortgage during the charging period, the ERC could run into thousands of pounds.

Product fees can also make a substantial difference to the overall cost.

Is It Better to Pay a Mortgage Arrangement Fee Upfront?

That depends on your circumstances.

Paying the fee upfront avoids adding that amount to your mortgage debt.

Adding the fee to the mortgage may preserve savings but generally means paying additional interest on the amount borrowed.

Are Mortgage Valuations Free?

Some mortgage products include a free basic valuation, while others charge a valuation fee.

The arrangement depends on the lender and product.

Remember that a mortgage valuation isn’t necessarily the same as a detailed property survey.

Can Mortgage Fees Be Included in the Loan?

Certain fees, particularly mortgage product fees, can often be added to the mortgage, subject to lender requirements.

However, doing so increases the amount borrowed and can result in additional interest costs.

How Lansdown Financial Services Can Help

Choosing the right mortgage involves considerably more than finding the lowest advertised interest rate.

At Lansdown Financial Services, we’ll look at what your mortgage is actually likely to cost.

That means considering the interest rate alongside product fees, incentives, monthly repayments, early repayment charges and other relevant product features.

Sometimes the mortgage with the lowest interest rate will also be the most suitable option.

Sometimes it won’t.

Our role is to compare the available products, explain the differences and help you make an informed decision.

Whether you’re buying your first home, moving property or remortgaging, our award-winning mortgage advisers can help you understand the costs before you commit.

As a free, whole-of-market mortgage adviser with access to more than 70 lenders, we provide straightforward, personalised mortgage advice without the jargon.

Want to know which mortgage actually offers the best overall value for your circumstances?

Contact Lansdown Financial Services or call 01225 459515 to speak to one of our award-winning mortgage advisers for free, expert mortgage advice.

Your home may be repossessed if you do not keep up repayments on your mortgage.

---

About the Author

Written by Doug Miller, Director at Lansdown Financial Services.

Doug Miller is a mortgage broker and co-founder of Lansdown Financial Services, based in Bath, quoted in 30+ news articles including the Guardian, Sky News, This is Money and the Sun.