A mortgage is likely to be the largest financial commitment you ever make. Yet the mortgage market — with hundreds of lenders, thousands of products and constantly shifting rates — is genuinely complex to navigate. Whether you are buying your first home, moving to a larger property or approaching the end of a fixed-rate deal, understanding your options clearly before you commit can make a significant difference to what you pay over the life of your mortgage.

This guide explains how residential mortgages work, what types are available, what the current market looks like in 2026, and what to consider at each stage of the process.

Where are mortgage rates in 2026?

After a period of sharp rate rises following the 2022 inflation surge, mortgage rates have been gradually easing. The Bank of England cut its base rate four times during 2025, bringing it from 4.75% to 3.75% by the end of the year. As of early 2026, the base rate stands at 3.75%, with further cuts possible depending on inflation and global economic conditions.

Fixed mortgage rates do not move in lockstep with the base rate — they are priced primarily off swap rates, which reflect market expectations of future interest rates. This means fixed rates can rise even when the base rate is held or cut, and vice versa. It is one of the reasons why timing the market is difficult and why understanding your own circumstances matters more than waiting for the perfect rate.

Average two-year fixed rates were around 4.85–4.91% at the start of 2026, with five-year fixes slightly higher at around 4.94%. Best-buy deals for borrowers with larger deposits were available at lower rates. The average standard variable rate — the rate you revert to when a deal ends — sat at approximately 7.15% in April 2026, making it significantly more expensive than any new fixed deal.

Types of residential mortgage

Not all mortgages work the same way. The type you choose affects how your monthly payments behave, how long you are committed to a lender and what happens if you want to exit early.

Most borrowers with a residential property choose a fixed rate for the payment certainty it provides, particularly when managing a household budget. However, the right type depends on your circumstances — how long you plan to stay in the property, whether you might want to overpay or move before the deal ends, and your view on where rates are heading.

How much can you borrow?

Most lenders use an income multiple of between 4 and 4.5 times your gross annual income as a starting point. Some will lend up to 5 or even 5.5 times income under certain circumstances, particularly for higher earners or professionals in specific occupations.

However, lenders do not just look at your income. They carry out a full affordability assessment that considers your outgoings, existing debts, credit commitments, childcare costs and other financial obligations. They also apply a stress test — checking whether you could still afford the payments if rates were to rise significantly above the rate you are paying. Passing the affordability assessment is not just about the rate you start on; it is about your overall financial position.

Your deposit size also matters significantly. A larger deposit gives you access to lower loan-to-value (LTV) products, which typically have better rates. The difference in rate between a 5% deposit mortgage and a 25% deposit mortgage can be substantial over a 25-year term.

Buying your first home in 2026

The past few years have been challenging for first-time buyers. Higher mortgage rates and rising house prices have stretched affordability, particularly in the South East where property prices remain elevated relative to income. The typical first-time buyer property outside London was around £226,955 in early 2026, with average monthly repayments on a two-year fix at 80% LTV of around £1,038 per month over a 25-year term.

Some positive developments are emerging. Several major lenders have introduced higher loan-to-value products specifically for first-time buyers. In February 2026, Santander launched a ‘My First Mortgage’ product at up to 98% LTV, meaning a deposit of just 2% could be sufficient for eligible borrowers. The availability of such products changes frequently and eligibility criteria are strict, but it signals a market direction that may benefit first-time buyers in 2026 and beyond.

Stamp duty — what changed in April 2025?

Stamp Duty Land Tax thresholds changed on 1 April 2025, making buying more expensive for many buyers. First-time buyers now pay stamp duty on properties over £300,000, reduced from the previous threshold of £425,000. Home movers pay stamp duty on properties over £125,000, reduced from £250,000.

Stamp duty is payable in addition to your deposit and is generally not mortgageable — you need to fund it separately. It is an important cost to factor into your overall purchase budget well before you make an offer. Use the HMRC Stamp Duty calculator for an accurate figure based on your specific purchase price and circumstances.

Moving home — porting vs a new mortgage

If you already have a mortgage and are moving to a new property, you have two main options: port your existing mortgage to the new property, or take out an entirely new mortgage.

Porting means transferring your existing deal — same lender, same rate — to your new home. This can make sense if you are in the middle of a fixed-rate deal with significant early repayment charges, or if your current rate is competitive compared with what is available in the market. However, porting requires the lender to re-approve you on the new property, and it is not always straightforward if you need to borrow more or if your circumstances have changed.

Taking a new mortgage gives you access to the current market and potentially a better rate, but you will usually pay any early repayment charge on your existing deal. The right choice depends on the size of your ERC, the rate difference between your existing deal and the best available, and how much additional borrowing you need. This calculation is rarely straightforward and is one of the most common reasons people seek mortgage advice when moving home.

Remortgaging — when and why

Remortgaging means switching to a new mortgage deal — either with your existing lender (a product transfer) or with a new lender. The most common reason to remortgage is that your current fixed-rate or tracker deal is ending and you want to avoid reverting to your lender’s standard variable rate.

The timing matters. Most lenders allow you to secure a new rate up to six months before your current deal ends. Starting the process early means you are not rushed and not at the mercy of whatever rates happen to be available in the final weeks before your deal expires. If rates fall between securing a new rate and your completion date, many lenders will allow you to switch to a cheaper rate before the deal starts.

Remortgaging can also make sense outside of a deal expiry date if you want to raise capital — for home improvements, to help a family member or to consolidate debt — or if your property has increased significantly in value and you can now access lower LTV products. In all cases, weigh the potential saving against any ERCs and arrangement fees before proceeding.

Self-employed and complex mortgage applications

If you are self-employed, a contractor or have an income that is not straightforward to evidence, finding a mortgage can feel harder than it needs to be. Different lenders assess self-employed income in different ways — some use net profit, some use salary plus dividends, and some take a broader view of retained profits within a company. Most require at least two years of accounts or tax returns.

The mainstream lenders and comparison websites do not always surface the lenders most accommodating to self-employed borrowers. An independent adviser who knows which lenders take a flexible view — and how to present your income in the most accurate and favourable way — can make a significant difference to both the rate you achieve and the likelihood of a successful application.

Similarly, those with adverse credit history, non-standard income structures, or who are buying unusual property types may find the mainstream market less receptive. Specialist lenders exist for most situations, but access to them generally requires an intermediary.

Why use an independent mortgage adviser?

Going directly to your bank or using a comparison website can feel like the easiest route. But both have significant limitations.

Your bank can only offer its own products. It will not tell you if another lender has a better rate, lower fees or criteria better suited to your circumstances. Comparison websites cover a broad range but not the entire market — many lenders only work through intermediaries and do not appear on consumer comparison sites at all.

An independent mortgage adviser has access to the whole market, including those intermediary-only lenders. They assess not just the headline rate but the total cost over the deal period, the lender’s criteria, the flexibility of the product and how it fits your specific situation. They manage the application, liaise with the lender and keep you informed through to offer — taking the administrative burden off you at what is often one of the most stressful periods of a house move.

• Access to the whole market, including intermediary-only lenders
• Whole-of-market comparison, not just one lender’s products
• Advice on which lender’s criteria best fit your circumstances
• Management of the application and liaison with the lender
• Advice on associated protection — life insurance, critical illness, income protection
• Ongoing support when your deal ends or circumstances change

For impartial, free guidance on mortgages, the government-backed MoneyHelper service provides useful starting-point information. Regulated mortgage advice goes further, providing a personal recommendation tailored to your circumstances and carrying the protections of the FCA regulatory framework.

Written by Kris Dabner — Chartered Financial Planner

Kris is the founder of KMD Financial Planning LLP, an independent Chartered Financial Planner based in Hartley, Kent. He provides whole‑of‑market advice across mortgages, pensions, investments, estate planning and protection to individuals and families across Kent and the South East. Learn more about Kris.