Roughly £5.5bn of potential state revenue has been lost due to tax evasion, according to the government spending watchdog.
The vast majority of evasion took place in small businesses which can "easily exploit" weaknesses in government systems, the National Audit Office (NAO) said.
But the body that collects tax - HM Revenue and Customs (HMRC) - does not have a specific strategy to stop it, the NAO said, which means it "lacks a focus on, or explicit objective for, its performance".
Money blog: Youngest workers rank first for office days
Instead, HMRC aims to stop overall levels of non-compliance from rising.
It also doesn't know how successful it is at tackling evasion as it doesn't track how much reduction comes from the different forms of rule-breaking behaviour, the NAO found.
A growing problem
Evasion has increased among small businesses, despite slowing overall. Small companies now make up 81% of all evasion, HM Revenue and Customs (HMRC) said.
Tax evasion is when a taxpayer deliberately leaves out or falsifies information in tax returns to reduce the amount they're liable to pay.
Keep up with all the latest news from the UK and around the world by following Sky News
Tap hereThe absence of a specific business evasion strategy means there has been "too little emphasis" on some widespread forms of tax evasion in retail, such as abuse of the insolvency process to avoid paying tax debts, the NAO said.
There are "significant gaps" in checks for online retailers and overseas companies can falsely present themselves as being based in the UK to evade VAT, it added.
Attempts to collect more tax
Responding to the report HMRC said the UK has one of the lowest gaps between taxes collected and the amount that should be collected and the government is committed to reducing it further.
Read more
Elon Musk 'on track to be the first trillionaire by 2027'
Body Shop's remaining stores saved after rescue deal struck
All evasion amounts are estimates and could be much higher or lower.
"While the vast majority of businesses pay the tax that's due, we will continue to use our civil and criminal powers against the determined minority who refuse to play by the rules. Such action helped us protect £41.8bn in the last 12 months," an HMRC spokesperson said.
"We also work closely with partners including the Insolvency Service and Companies House to tackle evasion in retail and online services."
Disclaimer: The copyright of this article belongs to the original author. Reposting this article is solely for the purpose of information dissemination and does not constitute any investment advice. If there is any infringement, please contact us immediately. We will make corrections or deletions as necessary. Thank you.
