You do not need a finance degree to get a mortgage. You do need to understand what you are being told, because lenders, comparison sites and even some advisers throw around terms that sound harmless but can cost you thousands if you misunderstand them. This guide gives you mortgage jargon explained simply, in plain English, so you can spot a good deal, question the bad ones and make decisions with confidence.
Why mortgage jargon causes expensive mistakes
The mortgage market has a habit of making ordinary things sound technical. A low rate can look brilliant until you notice the fee. A lender can say you are approved in principle, but that does not mean your mortgage is fully agreed. A product can seem affordable today, yet become a strain when the fixed period ends.
That is where people get caught out. They focus on one number, usually the interest rate, and miss the full picture. The right mortgage is not just the cheapest-looking one. It is the one that fits your income, deposit, plans and risk tolerance.
Mortgage jargon explained simply: the terms that matter most
Agreement in Principle
An Agreement in Principle, often shortened to AIP or DIP, is a lender saying, based on the information you have given so far, they may be willing to lend to you. It is useful when making an offer on a property because it shows you are a serious buyer.
But do not treat it like a guarantee. The lender still needs to check your documents, credit profile, affordability and the property itself. Plenty of buyers think they are home and dry at AIP stage, then get a nasty shock later.
Loan to Value
Loan to Value, or LTV, is the percentage of the property price that you are borrowing. If you buy a home for £250,000 and put down a £25,000 deposit, you are borrowing £225,000. That means your LTV is 90%.
This matters because lower LTVs usually open the door to better rates. In simple terms, the more deposit you have, the less risk the lender sees. Sometimes even a small increase in deposit can move you into a better pricing band.
Fixed rate, tracker and variable rate
A fixed rate means your interest rate stays the same for a set period, often two years or five years. Your monthly payment stays predictable during that time, which many borrowers prefer when budgeting.
A tracker mortgage follows the Bank of England base rate, plus a set percentage. If the base rate changes, your payment usually changes too. That can work well when rates are low, but it comes with uncertainty.
A standard variable rate, often called SVR, is the lender’s own rate after your initial deal ends. It is usually higher than the deal you started on. This is one of the most common traps in mortgages. People take a deal, forget to review it, then drift onto the SVR and overpay.
Initial rate and reversion rate
The initial rate is the special rate you get at the start of the mortgage deal. The reversion rate is the rate you move onto afterwards, often the lender’s SVR.
This is why a headline rate is not enough on its own. A cheap initial deal can become expensive later if you sit on it too long. Good mortgage planning includes what happens after the fixed or tracker period, not just what happens on day one.
APRC
APRC stands for Annual Percentage Rate of Charge. It is meant to give you a broader picture of the overall cost of the mortgage, including certain fees, over the full term.
Useful? Yes, to a point. Perfect? No. APRC assumes things about future rates and that you keep the mortgage for a long time, which may not reflect real life. If you are likely to move, remortgage or overpay, the number can be less helpful than it first appears.
Arrangement fee
This is the fee a lender charges to set up the mortgage product. Sometimes it is called a product fee. It can be a few hundred pounds or well over £1,000.
A lower interest rate often comes with a higher fee. That is not automatically bad. If the monthly saving beats the fee over the period you expect to keep the deal, it may still be worth it. It depends on your loan size and how long you plan to stay put.
Valuation, survey and conveyancing
These get muddled together all the time, but they are not the same.
A valuation is for the lender. It checks whether the property is worth what you are paying and whether it is suitable security for the loan. It is not a detailed health check of the home.
A survey is for you. It looks at the condition of the property and can flag damp, movement, roof issues and other costly surprises. Skip it at your own risk.
Conveyancing is the legal work involved in buying, selling or remortgaging a property. That includes searches, contracts and transferring ownership. Different job, different purpose.
Affordability
Affordability is the lender’s assessment of whether your income and outgoings support the mortgage. It is not just about salary. Lenders may look at credit commitments, childcare, travel costs, bonuses, overtime and even how future rate rises could affect you.
This is why two lenders can look at the same applicant and come to different answers. Criteria vary. One may be generous with bonus income, another may barely count it. One may like self-employed applicants, another may not.
The mortgage words that catch buyers out
Early repayment charge
An early repayment charge, or ERC, is a penalty for leaving the mortgage deal too soon. That could mean remortgaging, selling, or paying off too much of the balance during the deal period.
This matters if you might move home, receive a lump sum or want to remortgage before the fixed term ends. A deal with a great rate can be the wrong choice if it locks you in at the wrong time.
Porting
A portable mortgage means you may be able to take your current mortgage deal with you when you move home. Sounds simple. It rarely is.
Porting is not automatic. You still need to reapply and meet the lender’s criteria at the time. If your circumstances have changed, the lender can still say no. So yes, portability is useful, but do not build your whole moving plan around it without checking the detail.
Overpayments
Overpayments are extra payments made on top of your standard monthly mortgage amount. They can reduce your balance faster, cut interest and shorten the mortgage term.
This is one of the easiest ways to save money long term, but there is usually a limit during a deal period, often 10% of the balance each year. Go above that and an ERC may kick in.
Freehold and leasehold
If you buy a freehold property, you own the property and the land it stands on. If you buy leasehold, you own the property for a set number of years, but not the land.
Leasehold is common with flats. The key issue is that lease terms, ground rent and service charges can affect both affordability and lender appetite. A cheap flat can become less attractive very quickly if the lease is short or the charges are high.
Mortgage jargon explained simply for remortgaging
If you already have a mortgage, a few extra terms matter.
A product transfer means switching to a new deal with your current lender. It can be quicker and involve less paperwork, but it is not always the best value.
A remortgage means moving your mortgage to a different lender. That can open access to better rates or more suitable terms, but it depends on your property value, income, credit profile and how much is left on the mortgage.
Further advance means borrowing more from your current lender, often for home improvements or debt consolidation. It can be convenient, but convenience is not the same as value. You need to compare the total cost carefully.
How to use this jargon to your advantage
The trick is not memorising every term. The trick is knowing which questions to ask. What is the total cost over the deal period? What happens when the initial rate ends? Are there fees, penalties or restrictions? Does this lender suit my income type and credit history?
That is where good advice earns its keep. A proper adviser should translate the jargon, challenge the sales spin and structure the mortgage around your life, not just the lender’s headline deal. Mortgage Genius is built around exactly that approach – plain English, impartial advice and a focus on what actually saves you money.
If a mortgage explanation leaves you more confused than when you started, walk away. You are borrowing a large sum against your home. You deserve clarity, not waffle.
The best borrowers are not the ones who know every bit of jargon. They are the ones who know when to slow down, ask better questions and refuse to be rushed into a deal that only looks good at first glance.
