Estimate your commercial mortgage repayments in seconds.
Enter the loan amount, rate, and term to see monthly repayments and total interest. Use this as a quick guide before speaking to a lender or broker.
When you’re looking at buying or refinancing a commercial property, the first thing most people want to know is simple: what will it cost me each month?
This calculator gives you a straight answer. Enter the amount you need, the term of the loan, and an interest rate that feels realistic. You’ll get an estimate of what your monthly commercial mortgage repayments might look like, along with the total amount you’d pay over time.
It’s not about selling you anything – it’s about giving you a clear view before you sit down with a lender or make a big commitment.
And if you do want to talk through your options, as a whole-of-market commercial mortgage broker, we can help you work out what’s achievable and what’s best left on paper for now.
What Is a Commercial Mortgage?
A commercial mortgage is a straightforward concept. It’s a loan that helps a business buy or refinance property – the kind of place where the work actually happens. Offices, warehouses, shops, units.
It’s similar to a normal mortgage, just built for business property – so in essence, just a business mortgage. You can use it to buy somewhere new, refinance an existing site, or raise money from a building you already own.
Most run for several years, often between three and twenty-five, and are repaid monthly. The details – how much you can borrow, the rate, the terms – all depend on the property and the strength of the business behind it.
For many owners, it’s not just a loan. It’s a way to take control – to own the space instead of renting it, and to build something solid for the long term.
How Does a Commercial Mortgage Calculator UK Work?
A commercial mortgage calculator is there to give you a rough idea of what borrowing might look like – nothing fancy, just the basics. You type in a few details, and it does the sums.
Start with the property value, then add the amount you want to borrow, how long you’d like the loan for, and the interest rate you think applies.
From that, the calculator gives you an estimate of what your monthly repayments could be and roughly how much you’d pay in total over the term.
It’s not a promise or a mortgage offer of course – it’s just a way to see if the numbers make sense before you start talking to lenders. A quick reality check, so you know what you’re walking into before you maybe start speaking with a commercial mortgage broker.
Why use a Commercial Mortgage Payment Calculator?
Because before you borrow, you need to know what you’re dealing with.
A commercial mortgage is a big step and the numbers can look very different once you spread them over years. A commercial mortgage estimator helps you see that clearly. You can play with the figures, change the loan amount, adjust the term, try different interest rates – and see what happens to the repayments.
It’s a quick way to get your head around what’s realistic for your business. No sales talk, no guesswork – just a rough picture of what the loan could look like in real life.
It’s better to find that out now, on your screen, than later when you’re sitting in front of a lender.
Key Things to Know Before Using a Commercial Mortgage Estimator
Before you start punching numbers in, remember this: a calculator can only give you a rough idea. It’s useful, but it’s not the full story.
Every deal depends on the details – the property, the business, and the person behind it. Commercial mortgage lenders don’t just look at figures – they look at risk, stability, and whether the deal actually makes sense.
A few things matter more than people expect: how much deposit you’ve got, what kind of property it is, how long you’ve been trading, and what shape your accounts are in. Even the location can make a difference.
So yes, use the business mortgage calculator – see what the repayments might look like. But don’t mistake it for an answer. It’s just a way to get a feel for the numbers before you sit down with someone who can look at the whole picture.
Estimate Commercial Mortgage Costs in Seconds
Use the calculator below to estimate monthly commercial mortgage interest and total borrowing costs based on typical business mortgage rates.
Feel free to use our Finance Calculator
**Note: For exceeding 120 no. of payments, a group of 12 payments will be combined into a single payment number for better chart visibility.
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Figures are indicative only, based on typical UK commercial mortgage assumptions.
This focuses on repayments and borrowing costs – not fees, valuation costs, legal work, or the wider deal structure.
What this calculator shows
Estimated monthly repayments and total interest based on the figures you enter.
What this doesn’t include
Fees, valuation costs, legal work, or how the deal is structured – all of which can affect the final terms.
Want a more accurate figure based on your deal? We can sense-check it quickly.
Example: What this might look like in practice
Say you’re buying a commercial property for £500,000.
You put down a 30% deposit (£150,000), so you’re borrowing £350,000.
The rate comes in at around 6.75% over 20 years.
That would put repayments somewhere in the region of £2,600 – £2,800 per month.
But this is where it usually shifts.
Different lenders will stress the deal differently, price risk differently, and structure it in their own way – so the final numbers can move once it’s properly assessed.
This is why two lenders can give you completely different terms on the same deal.
Most commercial mortgages land somewhere around 65% to 75% loan-to-value, although that can move depending on the property and the strength of the deal.
Rates typically start from around 6%+, but pricing can shift quite a bit once a lender actually looks at the full picture.
Want to sanity-check your numbers?
If the figures look close, it’s worth checking how a lender would actually see the deal.
A quick review can often highlight better options – or flag issues early before you commit time or costs.
Frequently Asked Questions (FAQs)
Will the calculator tell me exactly what I'll pay?
Not exactly, but it will give you a ballpark figure – something to work from.
The real rate depends on your business, the property, and the deal you end up with. But it’s a good place to start. In order to get an exact quote for your commercial mortgage, we recommend you speak with a commercial mortgage broker.
How much deposit do I actually need?
Most commercial mortgage lenders want you to put in at least 25% of the property’s value for commercial mortgages.
More deposit is better however – as it shows your commitment to the lender and usually secures you a better rate, since less risk.
What if my business is new?
It’s tougher, but certainly still possible to secure a commercial mortgage. Some lenders will look at projections or other assets you might own.
The commercial mortgage calculator still helps you estimate what kind of payments you’d be taking on if things line up.
Can I use the calculator for a property I'm buying to rent out?
Yes, absolutely – the maths is the same. Just remember that commercial mortgage lenders treat investment and owner-occupied deals differently, so rates will vary.
We recommend you speak with a specialist commercial finance broker for best advice and options.
Can the calculator tell me if I'll actually get approved?
No, it can’t do that – it’s not that clever! It just runs the numbers. Approval depends on the lender, your business, your credit, and how solid the deal looks on paper.
The calculator helps you see if it’s worth the conversation in the first place. In order to determine if you can get approved for your mortgage, speak with a commercial mortgage broker.
Should I speak to a broker before applying for a commercial mortgage?
Short answer – you’ll probably save yourself a headache if you do. Commercial finance lenders don’t all play by the same rules.
One might like your deal, another won’t touch it – and that can change week to week. Go in blind and you can easily end up down the wrong path. Most people only realise that after they’ve already lost time.
A quick chat upfront just helps you avoid that.
Can I get a more accurate commercial mortgage quote?
Not from a calculator, no. It’ll point you in roughly the right direction, but that’s about it.
The real numbers only start to show once someone digs into the deal properly – and that’s where things tend to move. Sometimes it improves. Sometimes it doesn’t.
Either way, it stops being guesswork.
Summary
A commercial mortgage calculator UK is there to give you a feel for the numbers before you take things further. It helps you see what the payments might look like, how long the loan could run for, and what it all adds up to in the end. Nothing fancy – just a clear picture to work from to help calculate your business mortgage costs.
Every business and every property is different. The calculator won’t tell you exactly what a lender will offer, but it’ll help you understand what’s realistic and what isn’t. That’s often all you need at the start – a bit of clarity before you make big decisions.
If you’re thinking about buying or refinancing a property, run a few numbers. Then talk it through with someone who knows how these deals actually work. A good commercial mortgage broker can turn a rough idea into a plan that fits your business, your goals, and your pace.
Commercial Finance Network supports businesses and property investors across the UK and internationally in finding the right funding. We are directly authorised and regulated by the Financial Conduct Authority, providing clients with the reassurance that their finance is arranged under recognised regulatory standards.