Payroll Tax vs Sales Tax
Payroll Tax and Sales Tax are two Public Finance & Taxation concepts in AP Economics that students often mix up. A payroll tax is a tax on wages and salaries, usually split between employer and employee, that funds social insurance programs. A sales tax is a tax on goods and services collected at the point of sale as a percentage of the price. Here is how they compare side by side.
A payroll tax applies to earnings from work rather than to all income, so wages are taxed but interest, dividends and capital gains are not. The statutory burden is often split, with half withheld from the worker's check and half paid by the employer, but because labor supply is relatively inelastic, workers bear most of the true burden either way. Many payroll taxes apply only up to an annual earnings cap, so a worker earning far above the cap pays the same dollar amount as one right at it and therefore a smaller share of total income. That cap is why the payroll tax is regressive at the top, while an income tax with rising marginal rates is progressive.
It is generally considered regressive because lower-income households spend a larger share of their income on taxed consumption. It is a major revenue source for U.S. state and local governments.
Payroll Tax vs Sales Tax: Taxed When You Earn or Taxed When You Spend
| Payroll Tax | Sales Tax | |
|---|---|---|
| What triggers it | Earning a wage | Buying a good or service |
| Direct or indirect | Direct, since it is levied on income itself | Indirect, since it is levied on a transaction and travels in the price |
| Who sends the money to the government | The employer, out of payroll | The retailer, out of the till |
| How visible it is | The worker's share appears on a payslip, the employer's share usually does not | Added at the register in some countries and buried in the shelf price in others |
| Why it is called regressive | Wages above any ceiling escape, and wages are a smaller share of high incomes | Lower-income households spend a larger share of what they earn |
| Treatment of saving | Charged on income whether it is saved or spent | Charged only on income that is spent, so saving waits until it is used |
| What it usually funds | Social insurance, often through earmarked accounts | General revenue, often for a state or a city rather than the nation |
A flat rate on spending is not a flat rate on income
This is the arithmetic that makes a sales tax regressive, and it has nothing to do with charging different people different rates. Take two illustrative households. The first earns 30,000 and spends 28,000 of it. The second earns 150,000 and spends 90,000, saving the rest. Apply the same sales tax of 6 percent to both. The first pays 6 percent of 28,000, which is 1,680. The second pays 6 percent of 90,000, which is 5,400. In dollars the richer household pays more than three times as much. Measured against income, though, the first pays 1,680 out of 30,000, which is 5.6 percent, and the second pays 5,400 out of 150,000, which is 3.6 percent. The rate charged was identical and the burden relative to income still fell as income rose. The mechanism is simply that saving is untaxed until it is spent, and richer households save a larger share. Whether that is unfair depends on whether you think a lifetime or a single year is the right window, since savings eventually get spent by somebody. The figures are illustrative.
Who writes the cheque tells you nothing about who carries the burden
The direct and indirect labels describe legal machinery, not economics. A payroll tax is usually split on paper between employer and employee. That split does not survive contact with the labour market, because the burden lands wherever the less responsive side of the market is, and labour supply tends to respond weakly to small changes in the wage. Most economists therefore conclude that workers bear the greater part of a payroll tax whichever half the law names. The same reasoning governs a sales tax. It is collected from the retailer, yet how much reaches the customer depends on the elasticity of demand and supply for that particular good, not on the wording of the statute. In both cases the gap the tax opens between what a buyer pays and a seller keeps is the same object described at /glossary/tax-wedge, and the split of that gap follows the same rule. The practical lesson for an exam is to answer questions about incidence with elasticities rather than with who hands the money over. Work through a split at /calculate/tax-incidence.
Frequently asked questions
What is the difference between a payroll tax and a sales tax?
A payroll tax is charged on wages when they are earned and is withheld by the employer, while a sales tax is charged on purchases and is collected by the seller. One reaches income as it arrives and the other reaches income only when it is spent, which is why saving escapes the second until the money is used.
Is a sales tax a direct or an indirect tax?
It is an indirect tax, because it is levied on a transaction and collected from the seller, who passes some or all of it on in the price. A tax charged on a person or a firm's income, such as a payroll tax, is a direct tax by the same classification.
Why are both taxes called regressive if the rate is flat?
Because a flat rate on wages or on spending takes a larger share of a small income than of a large one. Households with low incomes spend nearly all of what they earn, so a consumption tax reaches almost the whole of it, and where a payroll tax stops at a wage ceiling the earnings above that ceiling are untouched.
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