UK long term borrowing costs have just hit their highest point in 28 years. This adds fresh pressure on businesses, property investors, and the government.
Quick answer: On 1 September 2026, the yield on 30-year UK government bonds reached about 5.89%. These bonds are known as gilts. That is the highest level since 1998. The 10-year gilt yield also climbed. It moved close to 5.25%, a level not seen since the 2008 financial crisis.
This shift does not mean every loan will cost right away. But if market rates stay high, firms could pay more. This applies to firms refinancing debt or taking out new loans.
Why Are UK Gilt Yields Rising?
This move is part of a wider sell off across global bond markets. It is not just a UK problem.
Oil prices are adding to the pressure. Brent crude rose above $92 a barrel on Tuesday. Tensions in the Middle East raised fears about energy supply.
Higher energy costs can push up inflation. When that happens, markets often expect rates to stay high for longer.
UK rate expectations have shifted too. Bank Rate sits at 3.75% right now. But markets are pricing in the chance of more rate hikes before the end of 2026.
UK budget worries are adding even more pressure. The government is getting ready for the Budget on 28 October 2026.
What Higher Borrowing Costs Mean for Businesses
Rising gilt yields do not set the rate on every business loan. Loan rates also depend on Bank Rate, SONIA, lender costs, and the borrower’s own finances.
Even so, some firms could face tougher terms if market rates stay high. This includes firms that need new loans or are close to a renewal date.
That extra cost can strain cash flow. It can also make debt-funded growth less attractive.
What businesses should check now:
- Which loans are fixed and which can change
- Which loans will need renewal soon
- Whether cash flow could handle higher costs
Waiting until a loan comes due leaves less time to compare options. It also leaves less time to adjust spending plans.
Landlords and Property Investors Face Refinancing Pressure
Property investors need to watch rates closely too. UK mortgage approvals fell to 56,053 in July. That is the lowest count since January 2024. Higher costs can make refinancing harder. They can also cut the cash a highly geared property brings in.
Landlords nearing a mortgage renewal should check a few things first. Look at interest costs, rental income, and expected cash flow before you agree to new terms.
This does not mean every landlord should change how they hold their property. Moving property into a limited company brings its own tax and legal effects. Always seek expert advice first.
Why Rising Gilt Yields Matter Before the Budget
Higher government borrowing costs also hit the Treasury.
The Office for Budget Responsibility has run the numbers. A steady one-point rise in Bank Rate, and gilt yields could add about £15 billion to government borrowing by 2030-31.
That makes the coming Budget matter even more for firms. Higher debt costs can leave the Chancellor less room for other spending or tax moves.
Even so, businesses should not assume any one tax will rise. Wait for the government to share its real plans first.
What Businesses Should Do Now
- Review your debt and refinancing dates
- Test how your cash flow holds up under higher rates
- Rethink any growth plans that lean heavily on borrowed money
- Get ready for more than one Budget outcome, rather than acting on guesswork
At Lanop, we help businesses review cash flow, tax exposure, financing choices, and long-term plans as part of wider tax planning. Rates are shifting fast, and the October Budget is close. Early planning gives directors more time to weigh their options. It also helps them act before costs climb further.
