Mortgage Terms Explained:  Mortgage language can affect how you compare products, understand costs and assess the commitments within a mortgage offer.

A rate may look attractive until fees, early repayment charges and the reversion rate are considered. Similarly, an Agreement in Principle may indicate possible borrowing without guaranteeing a mortgage offer.

This glossary explains common UK mortgage terms in practical language. It covers applications, affordability, interest rates, legal work, property valuations and mortgage repayments.

At a Glance

• A mortgage rate does not show the complete cost of borrowing.
• APRC includes the rate and certain mortgage charges.
• Loan-to-value compares the mortgage with the property value.
• An Agreement in Principle is not a mortgage offer.
• A mortgage valuation is completed for the lender.
• Early repayment charges may apply when leaving a deal early.
• A product transfer stays with the existing lender.
• A remortgage normally involves replacing the mortgage.
• Mortgage criteria, fees and terminology can differ between lenders.

Understanding the words is only the beginning. Their practical effect depends on the mortgage, the property, and the applicant.

Find a mortgage term

Use the sections below to find the term you need:

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V

A

Additional borrowing

Additional borrowing means increasing the amount secured against a property.

The money might be used for home improvements, debt consolidation or another permitted purpose. The lender will usually reassess affordability, credit history and property value.

Borrowing more increases the mortgage balance. It may also increase monthly payments and the total interest payable.

Agreement in Principle

An Agreement in Principle estimates how much a lender may consider lending. It may also be called a Decision in Principle or Mortgage in Principle.

It is usually based on initial information about income, expenditure and credit history. It is not a mortgage offer or guarantee.

Applicants can learn more through the first-time buyer mortgage guide.

Annual Percentage Rate of Charge

The Annual Percentage Rate of Charge, or APRC, represents the estimated annual cost of a mortgage.

It includes the interest rate and certain mortgage charges. The calculation assumes the mortgage continues under the stated terms.

APRC can support comparison. However, it may be less representative when a borrower expects to change products before the full mortgage term ends.

Arrangement fee

An arrangement fee is a charge for a mortgage product.

It may be paid upfront or added to the mortgage. Adding the fee avoids an immediate payment but means interest may be charged on it.

Always compare the total mortgage cost rather than considering the interest rate alone.

B

Bank of England Bank Rate

Bank Rate is set by the Bank of England.

It can influence mortgage pricing, particularly tracker and variable rates. However, fixed mortgage pricing also reflects funding costs, market expectations and lender strategy.

A Bank Rate change does not mean every mortgage rate will move by the same amount.

Booking fee

A booking fee may be charged when an applicant reserves a mortgage product.

It is sometimes separate from the arrangement fee. The fee may be non-refundable, even if the application is not completed.

The product terms should explain when it is payable and whether it can be refunded.

Buildings insurance

Buildings insurance covers the structure of a property against insured events.

Mortgage lenders normally require suitable cover from completion. The insured amount should reflect the rebuilding cost rather than the property’s market value.

Buildings insurance is different from contents insurance, which covers belongings within the home.

Buy-to-let mortgage

A buy-to-let mortgage finances a property intended for rental.

Assessment may include expected rent, deposit, property type, applicant income and landlord experience. Some applications are also affected by portfolio size or company ownership.

Read the buy-to-let mortgage guide for a fuller explanation.

C

Capital

Capital is the amount borrowed before interest and charges.

On a repayment mortgage, each monthly payment normally repays part of the capital and part of the interest.

On an interest-only mortgage, the capital usually remains outstanding until it is repaid separately.

Completion

Completion is the stage when the purchase funds are transferred and ownership changes.

The mortgage normally begins on completion. The buyer can usually collect the keys after the transaction has completed.

Completion is different from exchanging contracts.

Consent to let

Consent to let is temporary permission to rent out a home financed with a residential mortgage.

The lender may apply conditions, additional charges or a different interest rate. Permission should be obtained before the property is let.

It does not automatically convert the mortgage into a standard buy-to-let mortgage.

Conveyancing

Conveyancing is the legal work involved in buying, selling or remortgaging property.

It can include property searches, contract checks, transfer documents and registration work.

A conveyancer may be a solicitor or a licensed conveyancer.

Credit check

A credit check allows a lender to review information held by credit reference agencies.

A soft search is generally used for eligibility checks and is not normally visible to other lenders. A hard search is usually recorded and may be seen by other credit providers.

Applicants can review the importance of their credit file before applying.

D

Decision in Principle

A Decision in Principle is another name for an Agreement in Principle.

It provides an initial indication of possible borrowing. It does not confirm that the applicant or property will meet the lender’s full criteria.

The lender may still need documents, a valuation and a complete underwriting assessment.

Deposit

A deposit is the amount the buyer contributes towards the property purchase.

For example, a £30,000 deposit on a £300,000 property leaves £270,000 to finance. This creates a 90% loan-to-value mortgage.

Larger deposits can reduce loan-to-value. However, pricing and acceptance still depend on lender criteria.

Discounted-rate mortgage

A discounted-rate mortgage provides a reduction from a lender’s variable rate.

For example, a two-percentage-point discount from a 6% variable rate creates a payable rate of 4%.

The payable rate can change if the lender’s underlying variable rate changes.

E

Early repayment charge

An early repayment charge, or ERC, may apply when a mortgage is repaid during a specified period.

It may be triggered by remortgaging, selling, making excessive overpayments or switching products.

The charge is commonly calculated as a percentage of the amount repaid. The mortgage offer should state the applicable period and calculation.

Equity

Equity is the difference between a property’s current value and the borrowing secured against it.

For example, a £300,000 property with a £180,000 mortgage has £120,000 of gross equity.

Selling costs, repayment charges and other secured debts can reduce the amount ultimately available.

Older homeowners researching how property wealth may be used can read about equity release and its risks.

Exchange of contracts

Exchange is the point at which a property purchase usually becomes legally binding.

The buyer and seller agree the contract and completion date through their conveyancers. A deposit is commonly transferred at this stage.

The legal process differs in Scotland.

F

Fee-free mortgage

A fee-free mortgage removes one or more standard product charges.

It may exclude arrangement, valuation or legal fees. However, a fee-free mortgage does not necessarily have the lowest overall cost.

The rate, monthly payment and total payable should still be compared.

Fixed-rate mortgage

A fixed-rate mortgage keeps the interest rate unchanged for a stated product period.

Monthly payments normally remain stable during that period, provided the mortgage balance and terms do not change.

At the end of the fixed period, the mortgage may move to a reversion rate unless another product is arranged.

Freehold

Freehold ownership normally includes the property and the land on which it stands.

The owner is generally responsible for maintaining the building and land.

Some freehold properties may still have estate charges, covenants or restrictions.

G

Gifted deposit

A gifted deposit is money provided towards a property purchase without an expectation of repayment.

Lenders normally require confirmation of who supplied the gift and where the funds originated. The person providing it may need to confirm they will not own part of the property.

Not every source of gifted deposit is accepted by every lender.

Guarantor mortgage

A guarantor mortgage involves another person providing additional financial support.

The guarantor may agree to cover payments, provide savings as security or accept a charge against another property.

The structure and legal obligations vary. Independent legal advice may be required.

H

Hard credit search

A hard credit search is recorded on an applicant’s credit file.

It is commonly completed during a formal mortgage application. Multiple applications over a short period can influence how future lenders assess the credit profile.

A hard search does not automatically lower a credit score by a fixed number of points.

Higher lending charge

A higher lending charge may apply when a mortgage represents a high percentage of the property value.

It protects the lender rather than the borrower. Not all lenders use this charge.

Its presence should be stated in the mortgage illustration or offer.

House in Multiple Occupation

A House in Multiple Occupation, or HMO, is occupied by several people who do not form one household.

Licensing, planning and mortgage requirements can be more involved than standard buy-to-let property.

The HMO mortgage guide explains the lending considerations.

I

Income multiple

An income multiple compares the proposed loan with an applicant’s income.

A mortgage of £250,000 against £50,000 income represents five times income.

Lenders do not assess applications using income multiples alone. Expenditure, commitments, dependants, term and stress testing can affect affordability.

Interest-only mortgage

An interest-only mortgage requires monthly interest payments without automatically reducing the capital.

The original loan must normally be repaid at the end of the term. The lender will require an acceptable repayment strategy.

Lower monthly payments do not mean the mortgage costs less overall.

Interest rate

The interest rate is the percentage charged on the mortgage balance.

It can be fixed, variable, discounted or linked to an external rate. The rate is only one part of the mortgage cost.

Fees, incentives and product duration should also be considered.

J

Joint borrower, sole proprietor mortgage

A joint borrower, sole proprietor mortgage allows more than one person to support the mortgage while fewer people own the property.

For example, a parent may join the mortgage without appearing on the property title.

All borrowers remain responsible for the debt. Legal, affordability and tax implications should be considered.

Joint mortgage

A joint mortgage is held by two or more borrowers.

Each borrower is normally responsible for the full mortgage, not only an individual share. This is called joint and several liability.

Property ownership arrangements are related but legally separate.

K

Key Facts Illustration

Key Facts Illustration, or KFI, is an older name associated with standardised mortgage information.

Mortgage applicants may now receive an illustration using an ESIS or another prescribed format.

The document normally includes the rate, payments, fees, risks and total cost information.

L

Leasehold

Leasehold ownership provides the right to occupy a property for the remaining lease term.

The freeholder retains ownership of the building or land. Service charges, ground rent and lease restrictions may apply.

A short lease can affect valuation, saleability and mortgage availability.

Loan-to-income

Loan-to-income compares the mortgage amount with the applicant’s income.

It is used by lenders alongside broader affordability calculations.

A lender may apply different limits based on income, deposits, property type, or applicants’ circumstances.

Loan-to-value

Loan-to-value, or LTV, compares the mortgage with the property value.

A £240,000 mortgage on a £300,000 property has an 80% LTV.

LTV can affect product availability, rates and lender risk. Read how loan-to-value affects a mortgage for worked examples.

M

Mortgage deed

The mortgage deed creates the lender’s legal security over the property.

It gives the lender specified rights when the mortgage conditions are not met.

The terminology and registration process differ across UK jurisdictions.

Mortgage illustration

A mortgage illustration summarises the proposed mortgage terms.

It normally includes the rate, monthly payments, fees, early repayment charges and possible changes in cost.

It supports comparison but does not replace the final mortgage offer.

Mortgage offer

A mortgage offer is the lender’s formal agreement to provide a mortgage under stated conditions.

It follows assessment of the applicant and property. The offer may contain conditions that must be met before completion.

Offers also have expiry dates.

Mortgage term

The mortgage term is the period over which the borrowing is scheduled.

A longer term can reduce the initial monthly payment. However, it may increase the total interest paid.

The term may also be restricted by age, retirement plans or lender criteria.

N

Negative equity

Negative equity occurs when secured borrowing exceeds the property value.

For example, a £210,000 mortgage against a £200,000 property creates £10,000 of negative equity.

It can make selling or remortgaging more difficult because the sale proceeds may not repay the full balance.

New-build property

A new-build property is generally a newly constructed or newly converted home.

Lenders may use different maximum loan-to-value limits for new-build houses and flats.

Warranty cover, builder incentives and completion timescales may also affect the application.

O

Offset mortgage

An offset mortgage links savings with the mortgage balance.

Interest is calculated on the difference between the mortgage and linked savings. The savings are not normally used to repay the mortgage automatically.

The benefit depends on the rate, savings balance and product terms.

Outstanding balance

The outstanding balance is the mortgage amount that remains unpaid.

It may include capital, fees added to the mortgage and other charges.

A redemption statement provides the amount required to repay the mortgage on a particular date.

Overpayment

An overpayment is an amount paid above the required monthly mortgage payment.

It can reduce the balance, term or future interest. The exact effect depends on the lender’s calculation method.

Overpayment limits and early repayment charges should be checked first.

P

Porting

Porting means applying to transfer an existing mortgage product to another property.

The product may be portable, but the borrowing is not transferred automatically. The borrower and new property must still meet the lender’s criteria.

Extra borrowing may be placed on a separate product.

Product fee

A product fee is charged for access to a particular mortgage deal.

It may also be described as an arrangement or completion fee.

A lower-rate product with a large fee may cost more than a higher-rate product without one.

Product transfer

A product transfer changes the mortgage product with the existing lender.

It normally avoids moving the mortgage to another lender. The available options depend on the lender and borrower’s circumstances.

A product transfer should still be compared with suitable remortgage options.

R

Redemption statement

A redemption statement shows the amount required to repay a mortgage on a stated date.

It may include the remaining balance, accrued interest, early repayment charges and administration fees.

The amount can change when payments or interest are added.

Remortgage

A remortgage replaces an existing mortgage, usually with a new mortgage from another lender.

Reasons may include changing rates, borrowing more or altering the mortgage structure.

A remortgage can involve affordability checks, a valuation and legal work. The remortgage guide explains the usual process.

Repayment mortgage

A repayment mortgage uses monthly payments to repay capital and interest.

Provided all payments are made, the balance should be repaid by the end of the term.

The balance usually reduces slowly during the early years because interest forms a larger part of each payment.

Reversion rate

A reversion rate is the rate applied after an introductory mortgage product ends.

It is often the lender’s standard variable rate, although product terms differ.

Reviewing the mortgage before the product ends may help avoid an unplanned move onto that rate.

S

Secured loan

A secured loan is borrowing supported by a legal charge against property.

A mortgage is a secured loan. A second charge mortgage is additional secured borrowing behind the first mortgage.

Failure to maintain repayments can place the property at risk.

Self-employed mortgage

A self-employed mortgage is not a separate mortgage category.

The phrase describes a mortgage application where income comes from self-employment or company ownership.

Lenders may assess accounts, tax calculations, salary, dividends or retained profits. Read the self-employed mortgage guide.

Soft credit search

A soft search reviews credit information without normally leaving a footprint visible to other lenders.

It may be used for eligibility checks or an Agreement in Principle.

A formal application may still require a hard credit search.

Standard variable rate

The standard variable rate, or SVR, is a lender-managed variable rate.

The lender can normally change it under the mortgage terms. It does not have to track Bank Rate exactly.

Borrowers may move onto an SVR when an introductory product ends.

Stress test

A stress test considers whether mortgage payments could remain affordable under higher assumed costs.

The lender may test a higher interest rate or assess future changes in circumstances.

The method varies between lenders and mortgage types.

T

Tracker mortgage

A tracker mortgage follows a specified external rate plus or minus a stated margin.

For example, Bank Rate plus 1% creates a payable rate of 5% when Bank Rate is 4%.

Some tracker mortgages include a minimum payable rate or early repayment charge.

Transfer of equity

A transfer of equity changes the legal ownership of a property.

It may involve adding or removing an owner without selling the property.

The mortgage lender must normally agree when a mortgage remains secured against the property.

U

Underpayment

An underpayment is a temporary payment below the amount normally required.

It is only available when the lender and mortgage terms permit it. Previous overpayments may be required.

Reducing payments can increase the remaining balance or extend the repayment period.

Underwriting

Underwriting is the lender’s detailed assessment of the mortgage application.

It can include income, expenditure, credit history, deposit evidence, bank statements and property information.

The underwriter decides whether the application meets the lender’s policy and risk requirements.

V

Valuation

A mortgage valuation helps the lender decide whether the property provides acceptable security.

It is not a complete survey of the property’s condition. Defects may not be identified or reported to the buyer.

Applicants may arrange a separate home survey for more detailed information.

Variable-rate mortgage

A variable-rate mortgage has an interest rate that can change.

Tracker, discounted and standard variable rates are common examples.

Payments can rise or fall during the mortgage term.

Mortgage terms that are often confused

Agreement in Principle and mortgage offer

An Agreement in Principle is an initial indication. A mortgage offer follows full assessment and provides formal lending terms.

Mortgage valuation and property survey

A mortgage valuation protects the lender’s lending decision. A survey provides the buyer with more information about the property.

Product transfer and remortgage

A product transfer stays with the existing lender. A remortgage usually replaces the loan with borrowing from another lender.

Interest rate and APRC

The interest rate applies to the mortgage balance. APRC attempts to represent the wider annual cost, including certain charges.

Mortgage term and product period

The mortgage term may last several decades. The product period is the shorter period during which an introductory rate or product applies.

Why mortgage definitions need context

A definition explains what a term means. It does not show whether a mortgage is suitable.

Two products may use the same language but apply different:

• Affordability rules
• Income calculations
• Property restrictions
• Overpayment allowances
• Early repayment charges
• Maximum loan-to-value limits
• Evidence requirements

The practical meaning sits within the product terms.

For later-life borrowing, terminology can also affect estate planning, inheritance and long-term interest. The lifetime mortgage guide explains several terms used within that market.

Speak to a mortgage adviser

Understanding terminology can make mortgage documents easier to compare. However, definitions cannot account for every applicant, property or lender criterion.

A mortgage adviser can explain how the terms apply to your proposed borrowing and circumstances.

Contact Connect Mortgages to discuss your mortgage requirements.

Frequently asked questions

What is the most important mortgage term to understand?

No single term controls the whole mortgage.

Interest rate, APRC, fees, loan-to-value, mortgage term and early repayment charges should be considered together.

Is an Agreement in Principle guaranteed?

No.

It is based on initial information and is subject to full underwriting, supporting documents and property assessment.

Is the mortgage rate the total borrowing cost?

No.

Product fees, legal charges, valuation costs, insurance and early repayment charges may affect the total cost.

Is a mortgage valuation the same as a survey?

No.

The valuation is primarily for the lender. A home survey can provide the buyer with more information about condition and defects.

Can mortgage terminology differ between lenders?

Yes.

Different lenders may use alternative names for similar fees, documents or application stages. The lender’s documents should provide the applicable definition.

What happens when a fixed mortgage ends?

The mortgage normally moves to a reversion rate unless another product has been arranged.

Borrowers should check the end date, available options and any applicable charges before making changes.

Can I repay my mortgage early?

Possibly.

The mortgage terms will explain permitted overpayments and any early repayment charges. A redemption statement confirms the cost of repaying the full mortgage.

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