Category: Income · Horizon: Short to medium · Consensus: Broad among economists · Feasibility: High
What it is
A negative income tax (NIT) runs the tax system in reverse for people on low incomes. Everyone is guaranteed a minimum income. If you earn nothing, you receive the full guarantee; as your earnings rise, the payment is gradually withdrawn at a set rate until, above a break-even point, you start paying tax as normal. Because the payment tapers rather than stopping suddenly, working more always leaves you better off.
Why it matters in the age of AI
If AI displaces jobs unevenly, an NIT automatically supports people whose earnings fall, without anyone having to prove they are looking for work or fit a category. It scales up when incomes drop and scales down when they recover, which suits a fast-changing labour market. It can also replace a tangle of separate benefits with one simple rule run through the tax system.
Evidence and pilots
- Origins across the spectrum. The idea was championed by free-market economist Milton Friedman in the 1960s. A version, Richard Nixon’s Family Assistance Plan, passed the US House of Representatives but stalled in the Senate.
- The 1970s experiments. Between 1968 and 1980 the US and Canadian governments ran five NIT experiments, among the first large social science experiments of any kind. The biggest, in Seattle and Denver, enrolled about 4,800 families. Recipients worked somewhat fewer hours than a control group, with the averaged reduction for main earners in the region of 5–8%. Later analysis found much of this came from people taking longer between jobs rather than leaving work, and a recent re-analysis argues the effect on employment was small.
- Mincome, Canada. A guaranteed income in Dauphin, Manitoba, in the 1970s is often cited for showing better health and school outcomes alongside only modest reductions in work.
- Partial versions today. The US Earned Income Tax Credit and the UK’s Universal Credit both use tapers, though both are tied to work or conditions, so neither is a pure NIT.
Arguments for
- Cheaper than a universal basic income, because money goes only to those below the break-even point.
- Always rewards extra work, avoiding the benefit “cliffs” of many current systems.
- Simple to administer through the tax system, with less bureaucracy and stigma.
- Has supporters on both the free-market right and the redistributive left.
Arguments against
- The taper rate is a hard trade-off: a generous guarantee with a gentle taper is expensive, while a steep taper weakens the incentive to work.
- Annual tax assessment reacts slowly to sudden drops in income unless payments are calculated in real time.
- Some reduction in hours worked is likely, which critics see as a cost and supporters as freedom to retrain or care for others.
- If AI shrinks the tax base of wages, an NIT still needs a new source of funding.
Open questions
- What guarantee level and taper rate could win support from both left and right?
- Should it be paid to individuals or households?
- Could it be paired with a tax on AI profits or a citizens’ wealth fund to pay for it?
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