Standard Buy to Let Mortgages  What Every Landlord Needs to Know

Being a landlord in the UK is genuinely more complicated than it was five years ago. Rates are higher, tax has tightened, the regulatory picture has shifted, and an estimated 93,000 buy-to-let landlords exited the market in 2025 alone. That’s the context every landlord is working in right now, and it makes understanding your mortgage position more important than it has ever been.

Standard buy to let mortgages remain the foundation of most landlords’ financing. Getting them right in 2026 requires a clearer head than the straightforward market of a few years ago demanded.

Where Rates Actually Sit Right Now

The picture coming into 2026 was cautiously optimistic. The Bank of England base rate sat at 3.75%, lenders were trimming fixed rates, and there was a reasonable expectation that borrowing costs would ease further through the year. That optimism has taken a meaningful knock in recent weeks as conflict in the Middle East pushed energy prices upward, swap rates jumped sharply, and several lenders responded by increasing their fixed-rate products.

As of late March 2026, standard buy to let fixed rates for borrowers at 75% loan-to-value are running between 4.1% and 5.2%. Two-year fixed deals are averaging around 4.70%. Five-year fixes sit around 5.09%. Both figures are considerably lower than a year ago but considerably higher than the sub-2% environment landlords were working in during 2021. There are over 5,500 buy-to-let mortgage products currently on the market, which is a record high, and competition between lenders is creating pockets of opportunity for the right borrowers in the right circumstances.

The practical point is this. Anyone currently sitting on their lender’s Standard Variable Rate is paying somewhere between 6.5% and 8.5%. On a £150,000 mortgage, every 0.5% increase in rate costs roughly £750 a year in additional interest. SVR is an expensive place to sit and every month spent there is money that didn’t need to go.

How Buy to Let Mortgages Actually Work

The fundamental difference from a residential mortgage is how lenders assess affordability. With a residential mortgage, your income is the primary factor. With a buy to let mortgage, the rental income the property generates is the main consideration. Lenders apply an Interest Coverage Ratio, typically requiring the rental income to cover between 125% and 145% of the monthly mortgage payment at a stressed interest rate.

Most buy to let mortgages are structured as interest-only products. You pay the interest each month and the capital is repaid at the end of the term, usually from a property sale. That structure maximises monthly cash flow, which is why most landlords prefer it. Repayment buy to let mortgages exist but they’re less common and suit specific circumstances.

Minimum deposits are typically 25%, which gives access to the most competitive rate bands. Higher LTV products are available at 80% in some cases but the rates climb steeply and the lender criteria tighten. A 25% deposit is the standard entry point for mainstream buy to let lending.

What Lenders Look at Beyond the Rent

Rental income is the starting point but it isn’t the whole picture. Most lenders want to see that you’re already a homeowner, either with or without a mortgage on your own home. Many require a minimum personal income, often around £25,000 a year, although some lenders have removed minimum income requirements for experienced portfolio landlords in recent months.

Credit history matters considerably. Missed payments, defaults, and County Court Judgements all affect both eligibility and the rate you’re offered. If your credit file has anything on it, understand what it is and how individual lenders view it before you apply. A broker will know which lenders are more tolerant of specific credit events and which will decline outright.

Property type affects things too. Standard residential properties attract the most lenders and the most competitive rates. Houses of Multiple Occupation attract more scrutiny, specialist lenders, and higher fees. Ex-local authority flats, properties above commercial premises, and non-standard construction all reduce your lender pool and increase your rate.

The Limited Company Question

One of the more significant structural decisions for landlords in 2026 is whether to hold property in personal name or through a limited company. Since Section 24 removed the ability for individual landlords to offset mortgage interest against rental income as a business expense, higher-rate taxpayers buying new properties through limited companies have been able to retain the interest deduction that personal landlords lost.

The limited company buy to let market has expanded substantially in response. Lenders who previously offered limited company products reluctantly now treat them as a core part of their buy to let range. Rates for limited company landlords have come down considerably. The difference between personal and limited company rates has narrowed to a point where the tax advantage of the limited company structure is clearer than ever for higher-rate taxpayers.

The decision isn’t simple for everyone. Extracting profit from a company has its own tax implications. Existing portfolios in personal names face significant costs to restructure. Anyone making this decision for the first time or reconsidering an existing structure should take proper tax advice before the mortgage conversation.

The Renters’ Rights Act Changes Everything for Landlords

From 1 May 2026, the Renters’ Rights Act comes into force in England. The abolition of Section 21 no-fault evictions is the headline change but the practical implications run further. Landlords can increase rent only once in a twelve-month period and must follow a formal process to do so. Eviction timelines for genuine cases of rent arrears are extended. The overall balance of risk shifts towards the landlord, which is something lenders are already factoring into their affordability assessments.

This doesn’t make buy to let unworkable. It makes tenant selection and due diligence more important than before. It also makes cash flow management more critical. A property that’s cashflow-neutral in normal conditions becomes cashflow-negative during a dispute or extended void, and with less predictable recovery timelines, financial reserves matter more than they did.

Fixing or Tracking in an Uncertain Market

The rate environment is genuinely difficult to read right now. Fixed rates offer certainty but you’re locked in if rates fall. Trackers move with the base rate and benefit from cuts but carry upside risk if rates move the other way. Two-year fixes give flexibility to reassess sooner. Five-year fixes provide stability that suits landlords who want predictability across a longer horizon.

The honest answer is to make the decision based on your own cash flow position, your portfolio plans, and your tolerance for payment uncertainty. A broker working across the whole market will give you a clearer picture of the actual options than any comparison site.

Don’t try to time the market. Lock in a deal that works at current rates, keep it under review, and make a fresh assessment when your fixed period ends.