Martin Lewis has urged Brits to act now ahead of five big changes coming into force next month.
The finance guru issued the update in the latest edition of the Money Saving Expert newsletter.
The UK is currently facing a cost-of-living crisis as the price of energy bills, fuel and food are set to increase - as Mirror Online reports.
READ MORE: Martin Lewis urges Brits to stock on up 66p item ahead of April 4 increase
Martin explained April is typically the month when utility and public service price hikes are introduced, but warned this is the "worst in [his] professional memory".
He added: "With inflation (which groups together all price rises) predicted to hit a dire 8%. Action now is important - not everything is beatable though."
The Money Saving Expert explained five increases coming into effect next month along with advice to help people cope with the rise.
Council tax
Martin said most council tax bills will be going up by the maximum allowed on April 1, which is normally 3% a year.
That means the average home in band D would pay an extra £57 a year.
You cannot avoid these increases, but you can check if you are due a discount.
Mobile phone bills
Martin warned that mobile and broadband costs are going up for many on April 1 too.
He said: "Many of the 16 million who are out of contract across these sectors are due big price rises. Most hit around April 1, some are already in place. If so, see this as an opportunity to check if you can get a better deal elsewhere."
For broadband and line rental, most people who are out of contract pay in the region of £30 to £45 a month.
The finance guru advised Brits in this position to look for short-lived deals on price comparison websites.
He added: "The cheapest deals come from short-lived sign-up incentives on price comparison sites, such as an Amazon voucher or money on prepaid Mastercards."
Energy bills
The price of energy bills will skyrocket when the price cap rises by 54% next month due to the surging cost of wholesale gas.
Martin's advice throughout the crisis has been to stick with the price cap as this has represented a more cost-effective deal than any fixed contract.
However, the price cap is based on wholesale rates that energy firms pay over six months.
Russia's invasion of Ukraine has prompted the price of wholesale gas to soar to record highs - and Martin warned bills could surge again in October.
Martin said the situation is still unknown, but advised people to watch his Is it time to fix? video to work out when a fixed deal may be best for them.
Water bills
Water bills are going up in England and Wales by an average of 2% from April 1.
Martin said: " There's little you can do if yours is being hiked, but many are overpaying £100s by not switching to a water meter (many aren't too)."
His rule of thumb is that if you have the same, or more, bedrooms in your home than people, use a water meter calculator to see if this gizmo can save you money.
Save hundreds of pounds as the tax year ends
The current tax year ends on April 5, and Martin issued advice to both self-employed and employed workers.
He said: "With the tax year soon ending, you need to steal a March on April. There are many things that must be done now or it can cost you."
He continued: "Many taxable areas allow you to backdate claims by up to four tax years (on top of the current one). So with a new tax year starting on 6 April, unless you act now, you lose the chance of claiming anything you're due from the 2017/18 tax year (6 Apr 17 - 5 Apr 18)."
The Money Saving Expert also warned millions of employees have the wrong tax code without realising.
These codes tell your employer how much tax to take off your wages.
If your tax code is wrong, you only have until April 5 to get a refund for overpayments you might have made in 2017/18.
To help, MoneySavingExpert has a free Tax Code Calculator.
People who worked from home during the coronavirus pandemic can also claim back up to £280.
This is because of a special scheme from HM Revenue & Customs that let you claim back tax, depending on your tax bracket.
He added: "You can still claim for both the 2020/21 and 2021/22 tax years.
"Yet there are (unconfirmed) rumours that things may soon revert to how they used to be, so if you haven't done it, go quick."
You can check if you can claim here.
Receive newsletters with the latest news, sport and what's on updates from the Liverpool ECHO by signing up here
