The political turmoil in Westminster as Kier Starmer faces pressure over his position as Prime Minister is not just causing problems for politicians – it is also beginning to shake investor confidence in the UK economy.

UK government borrowing costs have spiked to a new decade-long high.

10-year gilt yields have hit their highest level since the 2008 financial crash, and 30-year bonds rose to a high last seen in 1998.

What does this mean for me?

While bond yields may sound distant from everyday life, their effects can quickly reach ordinary households.

Because government borrowing costs are used as a key reference point when setting interest rates, higher yields can quickly feed through into more expensive borrowing across the wider economy – particularly for mortgages and loans.

Higher government borrowing costs can also put pressure on public spending, as the government has to spend more money paying interest on its debt, directly affecting services like local councils or the NHS.

Political instability can also weaken confidence in the pound, making imports more expensive which drives up prices for consumers on everyday items like food, fuel and clothing.

And with the UK importing nearly 50% of its food, the cost of a weekly shop can quickly mount up.

Financial Planner Paul Harsum said: “It is difficult to ever put a rise in borrowing costs to a single factor.

“It would seem reasonable that the most recent spike, which has coincided with a Government Leadership contest for the Left wing Labour party, is caused by concerns that the leadership of the Government will change.”

What are government bonds?

Government bonds are an investment in which an individual loans money to the government in exchange for regular interest payments, also known as a coupons.

Governments issue bonds, known in the UK as gilts, when they need to borrow money to help fund public spending on areas such as healthcare, welfare, education and transport.

Bonds often labelled ‘risk-free’ because it is highly unlikely that the government will fail to repay the loan.

The interest rate, also known as the yield, is the annual return an investor earns for lending the money to the government.

So, when the interest rate increases, the government must pay more to borrow money.

This also means more public money is spent on debt interest payments rather than other services.

Therefore, the interest rate on 10-year bonds hitting 5.1% means the UK government now has to pay investors a much higher return to borrow money for the next ten years.

Why does political turmoil affect bonds?

In simple terms, investors are demanding more interest because they are becoming more cautious about the UK’s economic and political outlook.

The unstable environment sparks fears of weaker economic growth, unpredictable government policy and higher public borrowing, making investors see lending to the UK as a greater risk.

Investors are also concerned not only by how much governments borrow, but what the money is spent on.

Borrowing to invest in areas such as education or infrastructure is often viewed more positively because it can help grow the economy in the long term.

Should I be worried?

However, higher borrowing costs do not necessarily mean the UK is heading towards another financial crisis.

Financial markets often react sharply to political uncertainty, meaning borrowing costs can rise during periods of instability but fall again once the political situation becomes clearer.

While rising gilt yields are likely to contribute to more expensive mortgages and loans, any wider effects on households are unlikely to happen overnight. Changes to mortgage rates, prices and public spending decisions usually take time to filter through the economy.

Paul described the current situation as “a normal market reaction to uncertainty” and said people should avoid panicking over factors outside of their control.

Instead, he suggested people focus on managing their own finances carefully during periods of economic uncertainty by understanding their spending, avoiding unnecessary short-term debt and improving their financial awareness.

He also argued that greater public engagement with politics and economic policy is important, warning that long-term government overspending without sustainable returns can ultimately affect the financial wellbeing of households across the country.