Choosing between a **fixed rate** and a **variable rate** commercial mortgage comes down to two things: how much certainty you need on your monthly payments, and where you think interest rates are heading. A fixed rate locks in your borrowing cost for a set period; a variable rate moves with the market, giving you upside if rates fall and exposure if they rise.
As an ex-banker who has structured hundreds of commercial mortgage deals, I can tell you the right answer is rarely about chasing the lowest headline rate. It is about matching the rate type to your cashflow, your hold period, and your tolerance for payment volatility. This guide compares both options in the current 2026 market and shows you how to decide.
Fixed vs Variable Commercial Mortgage at a Glance
Most commercial mortgages in the UK are offered on either a fixed rate, a tracker rate (linked to the Bank of England base rate), or a standard variable rate set by the lender. The tracker and SVR products are both forms of variable rate mortgages, just with different reference points.
Here is how the three main rate options compare in the current market:
| Feature | Fixed Rate | Tracker (Variable) | SVR (Variable) |
|---|---|---|---|
| Current typical rate | 5.75% to 9.00% | Base rate + 1.25% to 5.50% (5.75% to 10.00%) | 6.00% to 10.00% |
| Rate stays the same for | The fixed term (2, 3, 5 years) | The tracker period (often whole loan) | Until the lender changes it |
| Best when | Rates likely to rise or you need certainty | Rates likely to fall, transparent margin | Rarely first choice, usually post-fix |
| Early repayment charge | Yes, during fix period | Usually none or very low | Usually none |
| Payment certainty | High | Low to medium | Low |
| Who it suits | Tight DSCR, owner-occupiers, budget-led | Confident borrowers, short hold | Borrowers between products |
The **Bank of England base rate** currently sits at 4.50% in early 2026, having come down from its peak of 5.25%. Market expectations are for further gradual cuts during the year, which is why so many borrowers are looking hard at the fixed or variable question right now.
How Fixed Rate Commercial Mortgages Work
A **fixed rate** commercial mortgage sets your **interest rate** for an agreed period, typically 2, 3, or 5 years. Your **monthly payments** stay the same throughout the **set period**, regardless of what happens to the base rate or the wider mortgage market.
Fixed **commercial mortgage rates** are priced off swap rates in the wholesale money markets rather than directly off the base rate. Current pricing looks like this:
- 2-year fixed: 5.75% to 8.50%
- 3-year fixed: 5.85% to 8.75%
- 5-year fixed: 6.00% to 9.00%
Note that the yield curve is currently inverted: 5-year fixes are often priced slightly higher than 2-year fixes because the market expects rates to fall. This is unusual and an important factor in current decisions.
Pros of a Fixed Rate Commercial Mortgage
- Payment certainty: your mortgage payment does not change for the fixed term, making budgeting straightforward
- Protection if rates rise: if the base rate moves against you, your fixed interest rate insulates you
- Easier DSCR management: lenders and borrowers can both model income coverage with confidence
- Useful for owner-occupiers: stable overheads support operating businesses where rent cost matters
Cons of a Fixed Rate Commercial Mortgage
- Early repayment charge during the fix, typically 1% to 3% in early years and tapering
- No benefit if rates fall: your rate stays put even if the market drops 1.00% or more
- Slightly higher initial rate in most rate environments compared with a tracker
- Less flexibility to refinance, restructure, or sell mid-term without a cost
How Variable Rate Commercial Mortgages Work
**Variable rate** **commercial mortgages** move with a reference rate. There are two main flavours: tracker mortgages, which follow the **Bank of England base rate** with a fixed margin added, and **standard variable rate** (SVR) products, where the lender sets the rate and can change it largely at their discretion.
Current **variable commercial mortgage rates** sit between 6.00% and 10.00%. A typical tracker is priced at base + 2.00% to 3.50%, giving an all-in rate of 6.50% to 8.00% on today's base rate.
Pros of a Variable Rate Commercial Mortgage
- Immediate benefit when the base rate falls (especially trackers)
- Lower or no early repayment charge, so you can refinance or repay when it suits you
- Transparent pricing on trackers: you always know the margin above base rate
- Often a lower starting rate than the equivalent fixed deal
Cons of a Variable Rate Commercial Mortgage
- Payments rise if the base rate goes up, which can stretch cashflow
- Harder to budget because your mortgage payment can change with each MPC meeting
- SVR risk: lenders can move their SVR independently of the base rate, sometimes faster than the market
- Less suitable for tight DSCR because covenant headroom can disappear quickly
In a falling-rate environment, a 2-year fix often beats a 5-year fix once you factor in the cost of refinancing into a lower rate at year two or three.
Payment Impact: £500,000 Loan Compared
The choice between a **fixed rate** and a **variable rate** has a direct effect on your **monthly mortgage payments** and the total cost of **borrowing** over the term. Here is what a £500,000 commercial mortgage on a 20-year **repayment** basis looks like across realistic 2026 rates:
| Rate type | Rate | Monthly repayment | Interest only | 5-year interest cost |
|---|---|---|---|---|
| 2-year fixed | 6.25% | £3,654 | £2,604 | £156,250 |
| 5-year fixed | 6.75% | £3,802 | £2,813 | £168,750 |
| Tracker (base + 2.25%) | 6.75% today | £3,802 | £2,813 | Varies with base rate |
| Standard variable rate | 7.25% | £3,952 | £3,021 | £181,250 |
A 0.50% rate difference on a **loan amount** of £500,000 costs you around £150 per month on a repayment basis and £12,500 over a 5-year term. On a £2 million loan, the same differential costs £50,000 over five years. The point is that small rate differences compound quickly across typical **loan size** and **mortgage term**. Add the **arrangement fee** (typically 1% to 2% of the loan) and the total cost of borrowing can shift again, which is why headline best rates do not always translate into the best deals.
When a Fixed Rate Is Usually the Right Choice
A **fixed commercial mortgage rate** tends to suit certain types of borrower and deal structure. From experience, I would steer most clients in the following situations towards a fix.
- Tight DSCR deals where a 1.00% rate rise would push you below covenant
- Owner-occupied mortgages where the property houses an operating business and predictability matters more than optimisation
- Long-hold investors who plan to keep the commercial property for 5+ years and want to remove rate risk for at least part of that horizon
- First-time commercial buyers who are still building their cashflow management discipline
- Deals on the edge of affordability where a stress test under variable rates would fail
High street **lenders** such as **Lloyds Bank**, **NatWest**, **Barclays**, and **HSBC** typically offer the most competitive fixed rates for these profiles, provided the **loan amount** is at least £250,000 to £500,000 and the borrower covenant is strong.
When a Variable Rate Is Usually the Right Choice
A **variable rate** or tracker tends to suit borrowers who can absorb payment volatility and want to benefit from anticipated rate cuts.
- Short hold investors planning to sell or refinance within 12 to 24 months
- Comfortable DSCR of 1.50x or higher, with genuine headroom for rate rises
- Confident borrowers with strong cashflow and clear view on the rate cycle
- Deals with planned capital injections that may be used to repay early, where avoiding early repayment charge matters
- Refurbishment or repositioning plays where the exit is a sale or refinance onto a different product
Challenger and specialist **lenders** such as **Aldermore**, **Shawbrook**, **Allica Bank**, **Hampshire Trust Bank**, **Investec**, **Paragon Bank**, **Interbay Commercial**, **Kent Reliance**, **Atom Bank**, **Redwood Bank**, and **Recognise Bank** offer flexible tracker and variable **rate products** that can fit these scenarios well.
What Most Borrowers Are Choosing in 2026
In the current **interest rate environment**, most clients we work with are choosing one of two paths:
- A 2 to 3 year fixed rate to lock in stability while base rate cuts feed through, with a planned refinance at the end of the term
- A tracker priced off the Bank of England base rate, typically at base + 2.00% to 2.75%, to benefit immediately from anticipated cuts
5-year fixes are less popular than usual because of the inverted yield curve. Locking in a higher rate for longer makes less sense when the market expects base rate to fall to 3.50% to 4.00% by late 2027. That said, the rate may suit borrowers who need maximum certainty for operational reasons, particularly owner-occupiers funding business premises.
How Fixed and Variable Commercial Mortgage Rates Compare to Residential
Both **fixed and variable** **commercial mortgage rates** are typically 1.50% to 4.00% higher than equivalent **residential mortgages**. The premium reflects greater perceived risk, smaller market size, more bespoke underwriting, and the unregulated nature of most **commercial lending**. The good news is that **commercial mortgage interest** is generally tax-deductible against rental or trading income, which softens the effective cost.
Unlike **residential mortgages**, where fixed deals dominate, the commercial market splits much more evenly between **fixed and variable rate** products. **Commercial mortgages are typically** structured to suit the deal, not to follow a single market default.
Choosing Between Fixed and Variable: A Practical Framework
For every client I work with, I run through the same five-question framework when **choosing between fixed and variable**.
- How tight is your DSCR? If you are at 1.20x or below, a fix protects your covenant
- What is your hold period? Short holds favour trackers; long holds often favour shorter fixes with planned refinances
- What is your view on rates? If you believe rates will fall faster than the market expects, a tracker captures more upside
- How much will an ERC cost you? If there is any chance you will sell or refinance early, the early repayment charge on a fix can outweigh the rate saving
- What is your cashflow tolerance? Owner-occupiers and tight investors need stability; cash-rich investors can ride out volatility
No two deals are the same, and the **rate type** that fits one borrower may be wrong for the next. Use our [commercial mortgage calculator](/calculators/commercial-mortgage) to model the payment impact of different rates on your **loan size**, and [contact our team](/contact) for a no-obligation discussion of which structure suits your circumstances.
For more on rate structures, see our [commercial mortgage rates explained](/knowledge-hub/commercial-mortgage-rates-explained) guide and current [commercial mortgage rates UK 2026](/knowledge-hub/commercial-mortgage-rates-uk) comparison. To learn more about how rate environment changes affect your deal, read [interest rate changes and commercial property](/knowledge-hub/interest-rate-changes-commercial-property).
*Written by Matt Lenzie, Founder of Commercial Mortgages Broker. Ex-Lloyds Bank & Bank of Scotland.*