Township Tax on Sugar-Sweetened Drinks
The township development committee proposes a 100-kyat specific tax on each 1-litre bottle of sugar-sweetened drink, currently selling at 1,000 kyat. Monthly sales are 500,000 bottles. A local study estimates price elasticity of demand at −1.6 and notes that low-income households spend a larger share of their budget on these drinks. Retailers say they will pass the full tax to consumers. Collection and enforcement would cost about 15 million kyat a month. The tax would be levied on the 20 registered bottlers; informal roadside producers, estimated at 15 percent of the market, would not be taxed. The committee wants both revenue for a school feeding programme and a reduction in sugar consumption. It must decide whether to approve the tax, modify it, or reject it.
1. Estimate the new consumer price, quantity sold, tax revenue, and net revenue after administration. Use the elasticity estimate and state your assumptions about the informal market.
Read the worked answer
The tax is fully passed on, so the price rises from 1,000 to 1,100 kyat, a 10 percent increase. With price elasticity −1.6, quantity demanded falls by 1.6 × 10 = 16 percent.
Total quantity after tax = 500,000 × 0.84 = 420,000 bottles a month.
Tax revenue depends on the taxed share. Formal sales before tax are 85 percent of 500,000 = 425,000 bottles. If the 16 percent fall applies proportionally, taxed sales become 425,000 × 0.84 = 357,000 bottles. Tax revenue = 357,000 × 100 = 35,700,000 kyat a month.
Administration cost = 15,000,000 kyat, so net revenue = 35,700,000 − 15,000,000 = 20,700,000 kyat a month.
Assumptions: full pass-through, no change in the informal share, no income effect, and no cross-border or home production response. If consumers switch to the untaxed informal market, taxed sales fall further and revenue is lower. If the tax is collected on all 420,000 bottles, revenue would be 42 million kyat and net revenue 27 million, but that overstates the likely yield because 15 percent of the market is informal. The estimate is therefore a best case for revenue, not a guaranteed amount.
2. Should the committee approve the tax? Consider revenue, health effect, regressivity, informal producers, and administrative cost. Recommend approve, modify, or reject.
Read the worked answer
The tax raises about 20.7 million kyat a month net, enough to be visible but not large relative to administration. The health effect is modest: a 16 percent fall in consumption is real, but the tax is a small share of the bottle price and consumers can switch to informal drinks. The revenue is also vulnerable because 15 percent of the market is untaxed; formal bottlers face unfair competition, and the informal share may grow.
Equity is a serious concern. Low-income households spend a larger share of their budget on these drinks, so a flat 100-kyat tax is regressive unless the revenue funds services that benefit them. The school feeding programme could offset this, but only if the money is actually earmarked and delivered. The administrative cost of 15 million kyat absorbs 42 percent of gross revenue, which is high for a township-level tax.
Recommendation: modify rather than approve as proposed. Set the tax by sugar content so it targets health harm more precisely, register or license informal producers, and use part of the revenue for enforcement and public education. Earmark the net revenue for school feeding to address regressivity. If enforcement cannot be improved, reject the tax: a low-yield, leaky tax may annoy consumers, hurt registered bottlers, and barely reduce sugar consumption.