UK oil producers and the country's electricity generators will finally find out later today the exact details of Chancellor Jeremy Hunt's tax raid on them.
There has been doom and gloom for weeks now in these industry sectors as rumours swirl on what the government is lining up to announce in the Budget.
Oil producers and electricity generators are expected to have to fork out tens of billions of pounds during the years ahead in new levies as Mr Hunt attempts to balance the books.
It has been reported that electricity generators could be hit with a 40% windfall tax on their "excess returns".
Mr Hunt is also said to be planning to toughen the existing windfall tax on North Sea oil and gas operators, raising the controversial energy-profits levy from 25% to 35% and extending it by three years until 2028.
The two windfall taxes between them are expected to generate £45billion over six years, depending on movements in energy prices.
Pay more tax
But it is not just the oil producers and electricity generators who will be targeted by the government.
The chancellor confirmed at the weekend what cash-strapped Britons were fearing - everyone is going to have to pay more tax.
Mr Hunt said then: "I've been explicit that taxes are going to go up."
The BBC reports this morning that the chancellor will say later that "difficult decisions" are needed to tackle soaring prices and limit mortgage costs.
But he faces a potential backlash from some Tory MPs who oppose big tax hikes.
The BBC understands the state pension and benefits will rise with prices. Energy support for consumers is likely to continue beyond April but will be less generous.
Economic failure
Labour said the country was "being held back by 12 years of Tory economic failure and wasted opportunities", with working people "paying the price".
The BBC has spoken to figures in Whitehall and Parliament about what is likely to be in the Budget.
It is expected that around 55% of the measures will be spending cuts and 45% will be tax rises. This is likely to equate to around £30billon in spending cuts and £24billion in tax rises.
Mr Hunt is likely to argue that this is not a return to the 2010 Conservative-Liberal Democrat coalition government's policy of austerity, with the balance of spending cuts to tax rises 80% to 20% under then-Chancellor George Osborne.
The government argues the measures are needed to fill a so-called fiscal black hole - the gap between what it raises and spends.
However, some have questioned how reliable the forecasts are and the political decisions ministers are making.
Freezing tax levels
The freezing of levels at which people pay various taxes will be a big theme of today's statement. As a result of inflation - now at 11.1% - and pay increases, people will end up paying more tax.
With inflation at a 41-year high, many government departments will see their budgets squeezed with below-inflation increases.
But it is expected the health budget will be protected and increase in real terms - even when price rises are taken into account.
The government will also save cash by making energy bill support less generous from April.
The Treasury is likely to say an energy price guarantee will remain in place, but be set at a higher level. That means millions of households will see their bills go up by hundreds of pounds a year from April.
Under the current scheme a household using a typical amount of gas and electricity is expected to pay £2,500 annually. This figure is likely to rise to just over £3,000 - but without the intervention the typical household bill would have hit £4,000.
No big surprises
After unexpected announcements in Mr Hunt's predecessor Kwasi Kwarteng's ill-fated mini-Budget, no big surprises are expected from the chancellor today.
Mr Hunt has already reversed almost all the tax rises announced in the mini-Budget in a bid to stabilise financial markets.
Unlike Mr Kwarteng, Mr Hunt will publish independent forecasts from the Office for Budget Responsibility alongside his statement.
The forecasts are expected to paint a grim picture, after the Bank of England warned the country is set for its longest recession since records began.