Coronavirus has brought large parts of the economy to a standstill, and the government has had to spend billions to support workers, businesses and the NHS.
So where is all the money going to come from?
How much will coronavirus cost the UK?
It’s still very early in the crisis, so it’s impossible to tell how big the final bill will be. It could be as much as £298bn just for this financial year (April 2020 to April 2021), according to the Office for Budget Responsibility (OBR), which keeps tabs on government spending.
That’s an absolutely enormous sum.
To put it into context: before the crisis, the government was expecting to borrow around £55bn.
Schemes to support public services, businesses and individuals, such as the Job Retention Scheme (furloughing) will cost £123bn, the OBR estimates.
The government will also raise less tax than it hoped. Unemployed or furloughed workers pay less income tax, businesses pay less tax if their profits are lower, and shoppers pay less VAT if they buy less.
The final bill could be even higher. Leaked Treasury documents suggested the figure this year could be as much as £337bn.
Even if the pandemic ends quickly, the government will have to borrow more money in future years too.
How will the money be raised?
At first the government will raise money by borrowing from investors.
They could be individuals, companies, pension funds, or foreign governments who lend the money to the UK government by buying bonds.
A bond is a promise to pay the money back in the future, and pay interest in the meantime.
The Bank of England will buy some of those bonds, which will make raising the money easier.
Can the UK afford all this debt?
In recent years, the government has been able to borrow easily at very low interest rates, which makes that debt more affordable.
There is a limit to how much the government can borrow, before interest payments become so great it can’t afford them. No-one knows quite where that limit is.
Even if the economy bounces straight back once lockdown is lifted, there will be more debt, and so more interest to pay.
But many commentators fear the recovery will take much longer than that.
So the government will be bringing in less money in taxes than it expected, and spending more to support people and the economy.
That will leave it with a gap between its spending plans, and the money coming in to pay for them – that’s known as the deficit.
Will I have to pay more tax?
The deficit leaves the government with a choice: increase borrowing, raise taxes, or cut spending. In the end, it may well do a mixture of the three – but those decisions haven’t been taken yet.
Some economists argue that all the costs of the crisis could be easily covered by borrowing alone, but many disagree.
Raising taxes would be politically awkward, because the Conservative 2019 manifesto promised not to raise the three biggest taxes. These are income tax, national insurance and VAT – which together bring in more than half of government revenue.
Increasing taxes means people have less money to spend, which would slow the economy down.
Cutting spending will also be difficult. There have been big cuts over the past decade, and many of the easy savings have already been made.
Some areas have long been protected, such as healthcare – but it would be difficult to reduce health spending after a big pandemic.
State pensions, another big spending item, are protected by a system called the “triple lock”, which guarantees at least a 2% increase every year. This was also guaranteed in the manifesto.
The chancellor could say the pandemic makes these promises impossible to keep. But difficult choices will certainly have to be made.
So how will this affect my life?
If taxes go up, people will soon realise they have less money to spend. Likewise, people would notice if lower public spending resulted in worse public services, such as longer waiting times in hospitals or fewer police on the streets.
But if doctors and nurses have their wages frozen, or benefits rise more slowly, that will be noticed by those affected.
The government may feel that some of its ambitious infrastructure plans such as road and railway improvements need to be postponed or cancelled.