Why are business borrowing costs rising when the base rate is unchanged?

Bank Rate prices short-term and variable borrowing. Fixed-rate term lending is funded against longer-dated market rates that track gilt yields, and gilt yields respond to inflation and government borrowing expectations. Ten-year gilts sold at 5.155% this week while Bank Rate stayed at 3.75%.

Which of my facilities are affected?

Overdrafts, trackers and most invoice finance follow Bank Rate and are broadly unchanged since July. Fixed-rate term loans, asset finance and commercial mortgages price off longer-dated yields, so new borrowing and refinancing in those categories is more expensive.

Should we delay investment until rates fall?

Delay is only a strategy if you have a reason to believe rates will fall, and markets are currently pricing the opposite possibility. A more robust approach is to raise the hurdle: accept shorter paybacks, favour operating expenditure over financed capital expenditure, and proceed with work that pays back quickly.

What payback period makes sense in this environment?

Prefer projects returning within a year, and treat anything beyond two years as needing a stronger case than it would have needed last year. A useful test is whether the project still makes sense if funded at 7 or 8% rather than at the rate you were quoted previously.

The Base Rate Has Not Moved. The Cost Of Borrowing Has

The Bank of England has held Bank Rate at 3.75% since July. This week the Treasury sold ten-year gilts at 5.155%, the highest auction yield in nearly two decades, with the ten-year yield sitting around 5.1%. Those two numbers are moving in opposite directions, and the second one is the one that prices most fixed-rate business lending.

For an SME weighing whether to fund something now or wait for cheaper money, that gap is the whole story.

Why the base rate and your loan rate have come apart

Bank Rate sets the price of short-term money and feeds fairly directly into variable-rate facilities: overdrafts, most invoice finance, tracker loans. Fixed-rate term lending is different. Lenders fund it against longer-dated market rates, which follow gilt yields, and gilt yields follow what markets expect about inflation and government borrowing rather than what the MPC did last month.

Right now markets are pricing in the possibility of rate rises to deal with inflation, even while the committee holds. Long-term borrowing costs are at multi-year highs across Europe, and thirty-year US Treasury yields have reached 5.33%. This is not a UK-specific event.

The practical translation:

If your borrowing is	It follows	Direction now
Overdraft, tracker, most invoice finance	Bank Rate	Flat since July
Fixed-rate term loan, asset finance, commercial mortgage	Gilt yields	Higher

Does this mean stop investing?

No, and that is the wrong frame. It means the hurdle rate has gone up, so the test a project has to pass is stricter than it was six months ago.

Three adjustments are worth making:

Shorten the payback period you will accept. A project that pays back in three years was defensible when money was cheaper. Where funding costs more, prefer work that returns inside two, and strongly prefer inside one.
Prefer operating expenditure to capital expenditure where the outcome is similar. A monthly subscription you can stop is worth more than an owned asset financed over five years when the cost of that financing is at an eighteen-year high. That calculus flips again when rates fall.
Protect the cash buffer before funding anything discretionary. Private credit stress is rising, with troubled loans held by major private debt investors back at 2017 levels, and energy costs are climbing again with Brent above 91 dollars and WTI above 85. Both squeeze working capital before they show up anywhere else.

What this does to the automation decision specifically

It sharpens it rather than stopping it. Most automation work an SME does is operating expenditure with a payback measured in weeks, which is precisely the profile that survives a higher hurdle rate. Replacing four hours a week of invoice chasing pays back almost immediately and does not need financing at all.

What does not survive is the large platform project financed over years on the promise of efficiency that arrives in year three. That was a marginal case when borrowing was cheap. It is a poor one now.

The test to apply before committing: if you had to fund this at 7 or 8% rather than at last year's rate, would you still do it? If the answer is yes, the rate environment is not your obstacle. If the answer is no, the project was never strong enough and the rate is doing you a favour by exposing it.

What to do in the next fortnight

Check what your existing facilities are actually priced against. A surprising number of business owners do not know whether their term loan is fixed or tracking, and it changes what happens next.
If you have a fix maturing within twelve months, start the conversation with your lender now rather than at renewal.
Recheck the payback assumptions on anything already approved but not yet started.
Keep the cash buffer intact. In an environment where borrowing is expensive, cash you already hold is worth more than it was.

This is general commentary rather than financial advice, and the right answer depends on your facilities, your sector and your covenants. The point is narrower than a recommendation: a held base rate is not evidence that borrowing has got cheaper, and any plan built on "we will refinance when rates come down" needs a second version that works if they do not.