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Sugar tax

The soft drinks industry levy (SDIL), or ‘sugar tax’, is a levy applied to UK-produced or imported soft drinks containing added sugar.

Sugar tax

What is the soft drinks industry levy?

The soft drinks industry levy (SDIL), or ‘sugar tax’, is a levy applied to UK-produced or imported soft drinks containing added sugar. It was announced in George Osborne’s March 2016 budget and came into force from April 2018.

The levy is paid to HMRC by the packager for drinks produced in the UK, or importer for drinks produced overseas, at the following levels:

  • No levy on soft drinks containing less than 5g of sugar per 100ml
  • 18p per litre on soft drinks containing between 5g and 8g of sugar per 100ml
  • 24p per litre on soft drinks containing more than 8g of sugar per 100ml.

Some exemptions apply, including milk-based drinks, juices and drinks produced by smaller businesses.[1]

Revenue from the levy was initially invested in programmes tackling childhood obesity; however since its first year revenue has, controversially, been gradually subsumed into the general tax pot.[2]

Why was it introduced?

The SDIL was introduced as an anti-obesity policy. It was central to the 2016 Childhood Obesity Strategy,[3] and was informed by proposals from public health experts[4] [5] [6] and high-profile campaigners.[7] Alongside its importance for public health, supporters emphasised its potential economic benefits through reducing obesity-related NHS expenditure and wider associated barriers to labour market participation.[8]

The SDIL’s primary aim was to incentivise soft drink reformulation to lower-sugar recipes. This was reflected in its design in that:

  • manufacturers were given two years between the levy’s announcement and implementation to reformulate before it became active
  • a tiered structure targeted the highest-sugar brands and incentivised sugar reductions
  • it was restricted to soft drinks, where zero-calorie sweeteners make like-for-like reformulation relatively simple (and healthier, despite some initial wariness).[9]

The levy also aimed to change behaviour, encouraging consumers to choose cheaper lower-sugar drinks over more expensive high-sugar options.

How was it introduced?

The SDIL was legislated through the Finance Act 2017, and implemented via the Soft Drinks Industry Levy Regulations 2018. Camilla Cavendish, head of the No.10 Policy Unit at the time, has said that this was strategic; the chancellor was concerned ministers would prevent the levy from entering parliament’s legislative programme if it followed the usual write-round process (whereby collective agreement is sought; something not required for finance bills).[10]

This reflected disagreement within government on the policy’s merits. Critics in parliament argued that the levy was:

  • overly interventionist (breaking with previous orthodoxy under the Public Health Responsibility Deal, where industries voluntarily pledged to change recipes and labelling)[11]
  • lacking in its evidence base, due to the inherent uncertainties within hypothetical impact models[12]
  • unfair on the soft drinks industry, as other unhealthy industries were not being similarly targeted[13]
  • regressive, as price rises disproportionately impact low-income households.[14]

Impact of the SDIL

Sugar consumption

Despite these criticisms the SDIL is widely regarded as a success. The total sugar sold in soft drinks by retailers and manufacturers decreased by 35.4% between 2015 and 2019, from 135,500 tonnes to 87,600 tonnes. Over the same period, the sales-weighted average sugar content of soft drinks declined by 43.7%, from 5.7g/100ml to 2.2g/100ml.[15

The primary mechanism driving these reductions has been recipe reformulation, representing 83% of SDIL-associated reductions in weekly calorie intake from soft drinks.[16] The two-year lead-in appears to have been key to this: almost a fifth of drinks above the 5g/100ml threshold when the levy was announced had dropped below it by 50 days before implementation.[17]

The remaining 17% of SDIL-associated reductions in weekly calorie intake from soft drinks were driven by consumers switching towards lower-sugar drinks.[18] Evidence suggests consumers are not substituting sugar from elsewhere (e.g. buying more confectionary),[19] indicating these changes have contributed to reducing sugar consumption overall.

Sales

As the chart above shows, while sugar consumption from soft drinks fell, total soft drinks sales increased by 14.9% between 2015 and 2019.[20] Within this, sales of no-levy drinks increased by 54.2%, while sales of low- and high-levy drinks fell by 79.1% and 54.8% respectively.[21] The industry’s long-term profitability was not harmed by the SDIL.[22]

Prices

Prices for high-levy (un-reformulated) drinks have increased, with studies reporting a range of pass-through rates* from 31%[23] (7.5p/litre) to 140% (33.6p/litre).[24] This does make the tax regressive as feared by critics. However prices for levy-exempt, reformulated and standard-levy drinks (the majority of the market) have remained more stable, meaning consumers still have a similar range of affordable soft drink options to before the levy.[25]

Alongside increasing prices directly, some manufacturers have also utilised ‘shrinkflation’, reducing the size of containers to compensate for the levy. While one recent study concluded this has not been widespread among branded soft drinks,[26] some big brands like Coca-Cola have confirmed they have reduced product sizes for their highest-sugar products.[27]

*Pass-through rates reflect the proportion of the levy costs passed on to the consumer through price increases. A 100% pass-through rate of the high-levy would mean a shelf-price increase of 24p/litre.

Obesity

Excess weight and obesity in the UK have continued to increase, with latest figures showing 64% of adults in England are overweight or obese.[28] This emphasises that the SDIL is not a ‘silver bullet’; reducing sugar consumption alone will not reverse these trends. With 14 different government strategies consistently failing to tackle these trends over the last three decades,[29] a wider rethink of how government designs and implements effective obesity policy is needed.

Where is the debate now?

Due to its rare status as a win-win policy for both public health and industry[30] the SDIL has enjoyed broad support,[31] and was praised as a policy success in the Johnson government’s 2020 Obesity Strategy.[32]

Calls to extend the levy’s remit to other unhealthy foods are growing.[33] The 2021 National Food Strategy (an independent review commissioned by Michael Gove and led by restaurateur Henry Dimbleby) advocated for a £3/kg sugar tax and £6/kg salt tax on ingredients for processed food manufacturers, restaurants and catering businesses.[34]

However, Liz Truss’ government sparked concern in September 2022 when a Treasury-ordered review of the 2020 Obesity Strategy (including the SDIL) was announced.[35] With Rishi Sunak’s government now in place the future of the UK obesity strategy is unclear. What is clear is that with concerning public health trends persisting,[36] at a time public services and in particular the NHS are under immense strain, analysis suggests a policy response to obesity should be a priority for the government.


[1] HMRC, ‘Check if your drink is liable for the Soft Drinks Industry Levy’, 2018, retrieved 10 November 2022, www.gov.uk/guidance/check-if-your-drink-is-liable-for-the-soft-drinks-industry-levy#drinks-that-are-not-liable-for-the-levy

[2] Dixon, H., ‘Bitter row as sugar tax millions diverted away from fighting childhood obesity’, The Telegraph, 3 January 2022, retrieved 7th November 2022, www.telegraph.co.uk/news/2022/01/03/bitter-row-sugar-tax-millions-diverted-away-fighting-childhood

[3] HM Government, Child Obesity: A Plan for Action, 2016, retrieved 10 November 2022, www.gov.uk/government/publications/childhood-obesity-a-plan-for-action

[4] House of Commons Health and Social Care Committee, 1st Report - Childhood obesity – brave and bold action (HC 465), The Stationery Office, 2015.

[5] Tedstone, A., Targett, V., Allen, R. and others, Sugar Reduction – The evidence for action, Public Health England, 2015, https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/470179/Sugar_reduction_The_evidence_for_action.pdf

[6] British Medical Association Professional Policy Division and Board of Science, Food for thought: promoting healthy diets among children and young people, British Medical Association, 2015, www.actiononsugar.org/media/actiononsugar/news-centre/sugar-in-the-news/2015/PO-FoodForThoughtreport-09-07-2015-(1).pdf

[7] Addley, E., ‘Jamie Oliver: David Cameron must be brave with sugar tax’, The Guardian, 19 October 2015, retrieved 10 November 2022, https://www.theguardian.com/society/2015/oct/19/jamie-oliver-david-cameron-has-not-written-off-sugar-tax

[8] Department of Health and Social Care, ‘2010 to 2015 government policy: obesity and health eating’, 2015, retrieved 10 November 2022, www.gov.uk/government/publications/2010-to-2015-government-policy-obesity-and-healthy-eating

[9] NHS, ‘The Truth about Sweeteners’, NHS, 2019, retrieved 10 November 2022, www.nhs.uk/live-well/eat-well/food-types/are-sweeteners-safe

[10] Institute for Public Policy Research, ‘How can health revitalise the economy? | Conservative party conference 2022’, [recording of public event], 6 October 2022, retrieved 10 November 2022, www.youtube.com/watch?v=s_BgVR8UM0Q

[11] House of Commons, Hansard, ‘Written Statements’, 18 April 2017, col 603.

[12] House of Commons, Hansard, ‘Written Statements’, 22 March 2016, col 1439.

[13] House of Commons, Hansard, ‘Written Statements’, 22 March 2016, col 1438.

[14] House of Commons, Hansard, ‘Written Statements’, 30 November 2015, col 5WH.

[15] Tedstone A., Targett V., Allen R. and others, Sugar Reduction – The evidence for action, Public Health England, 2015, https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/470179/Sugar_reduction_The_evidence_for_action.pdf

[16] Dickson A., Gehrsitz M. and Kemp J., Does a Spoonful of Sugar Levy Help the Calories Go Down? An Analysis of the UK Soft Drinks Industry Levy, Institute of Labor Economics, 2021, retrieved 10 November 2022, www.iza.org/publications/dp/14528/does-a-spoonful-of-sugar-levy-help-the-calories-go-down-an-analysis-of-the-uk-soft-drinks-industry-levy

[17] Scarborough P., Adhikari V., Harrington R.A. and others. ‘Impact of the announcement and implementation of the UK Soft Drinks Industry Levy on sugar content, price, product size and number of available soft drinks in the UK, 2015-19: A controlled interrupted time series analysis’. PLoS Med, 2020, vol. 17, no. 2, retrieved 10 November 2022, https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003025

[18] Dickson A., Gehrsitz M. and Kemp J., Does a Spoonful of Sugar Levy Help the Calories Go Down? An Analysis of the UK Soft Drinks Industry Levy, Institute of Labor Economics, 2021, retrieved 10 November 2022, www.iza.org/publications/dp/14528/does-a-spoonful-of-sugar-levy-help-the-calories-go-down-an-analysis-of-the-uk-soft-drinks-industry-levy

[19] Pell D., Mytton O., Penney T.L., and others. ‘Changes in soft drinks purchased by British households associated with the UK soft drinks industry levy: controlled interrupted time series analysis.’ BMJ, 2021, Vol. 372, No. 254, retrieved 11 November 2022, www.bmj.com/content/372/bmj.n254

[20] Ibid.

[21] Tedstone A., Targett V., Allen R. and others, Sugar Reduction – The evidence for action, Public Health England, 2015, https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/470179/Sugar_reduction_The_evidence_for_action.pdf

[22] Law C., Cornelson L., Adams J., and others. An analysis of the stock market reaction to the announcements of the UK Soft Drinks Industry Levy. Econ Hum Biol., 2020, Vol 38, August 2020, retrieved 11 November 2022, www.sciencedirect.com/science/article/pii/S1570677X19302096

[23] Scarborough P., Adhikari V., Harrington R.A. and others. ‘Impact of the announcement and implementation of the UK Soft Drinks Industry Levy on sugar content, price, product size and number of available soft drinks in the UK, 2015-19: A controlled interrupted time series analysis’. PLoS Med, 2020, vol. 17, no. 2, retrieved 10 November 2022, https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003025

[24] Dickson A., Gehrsitz M. and Kemp J., Does a Spoonful of Sugar Levy Help the Calories Go Down? An Analysis of the UK Soft Drinks Industry Levy, Institute of Labor Economics, 2021, retrieved 10 November 2022, www.iza.org/publications/dp/14528/does-a-spoonful-of-sugar-levy-help-the-calories-go-down-an-analysis-of-the-uk-soft-drinks-industry-levy

[25] Scarborough P., Adhikari V., Harrington R.A. and others. ‘Impact of the announcement and implementation of the UK Soft Drinks Industry Levy on sugar content, price, product size and number of available soft drinks in the UK, 2015-19: A controlled interrupted time series analysis’. PLoS Med, 2020, vol. 17, no. 2, retrieved 10 November 2022, https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003025

[26] Ibid.

[27] Coca Cola, ‘The Sugar Tax: Find out what the Government's soft drinks tax means for our drinks and you’, (no date) Coca Cola, retrieved 11 November 2022, www.coca-cola.co.uk/ingredients/reducing-sugar/lets-talk-about-soft-drinks-tax

[28] NHS, Health Survey for England, 2019, retrieved 7 November 2022, https://digital.nhs.uk/data-and-information/publications/statistical/health-survey-for-england/2019

[29] Theis D.R. and White M. ‘Is Obesity Policy in England Fit for Purpose? Analysis of Government Strategies and Policies, 1992–2020’, The Milbank Quarterly, 2021, Vol. 99, No. 1, retrieved 11 November 2022, https://onlinelibrary.wiley.com/doi/10.1111/1468-0009.12498

[30] White, M., ‘Sugar purchased in soft drinks fell 10% following introduction of industry levy’, MRC Epidemiology Unit, 2021, retrieved 11 November 2022, www.mrc-epid.cam.ac.uk/blog/2021/03/11/sugar-purchased-in-soft-drinks-fell-10-following-introduction-of-industry-levy/

[31] Pell D, Penney T, Hammond D, and others. ‘Support for, and perceived effectiveness of, the UK soft drinks industry levy among UK adults: cross-sectional analysis of the International Food Policy Study’, BMJ Open 2019, Vol. 9, No. 3, retrieved 11 November 2022, https://bmjopen.bmj.com/content/9/3/e026698

[32] Department of Health and Social Care, Tackling obesity: empowering adults and children to live healthier lives, 2020, retrieved 11 November 2022, www.gov.uk/government/publications/tackling-obesity-government-strategy/tackling-obesity-empowering-adults-and-children-to-live-healthier-lives

[33] Action on Sugar, ‘The Conversation Continues… Call for Theresa May to Introduce an Energy Density Levy on Confectionery, Make Nutritional Labelling on Menus & Packaging Mandatory and Ban Marketing of HFSS Products’, press release, 20 May 2018,  retrieved 11 November 2022, www.actiononsugar.org/news-centre/press-releases/2018/the-conversation-continues-call-for-theresa-may-to-introduce-an-energy-density-levy-on-confecti…

[34] Department for Environment, Food & Rural Affairs, ‘National Food Strategy: part one’, 2020, retrieved 11 November 2022, www.gov.uk/government/publications/national-food-strategy-for-england

[35] Campbell D., ‘Liz Truss could scrap anti-obesity strategy in drive to cut red tape’, The Guardian, 13th September 2022, retrieved 11 November 2022, www.theguardian.com/politics/2022/sep/13/liz-truss-could-scrap-anti-obesity-strategy-in-drive-to-cut-red-tape

[36] Triggle N., ‘How bad is our obesity problem?’, BBC News, 25th July 2020, retrieved 11 November 2022, www.bbc.co.uk/news/health-53514170

Keywords
Health
Political party
Conservative
Publisher
Institute for Government

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