Basic income and negative income tax: two routes to the same place

In debates about basic income an alternative regularly appears: the negative income tax. It is usually presented as the sensible, liberal version, set against a basic income regarded as utopian and expensive.

That opposition is largely false, and understanding why helps clarify what the real differences are.

What a negative income tax is

The idea is simple. Today the tax system runs in one direction: above a certain income you pay tax, below it you pay nothing. The proposal is to make it run both ways: below the threshold, instead of paying zero, you receive a transfer proportional to the distance from the threshold.

Someone with no income receives the maximum. Someone earning something receives less, at some withdrawal rate. Above the threshold, you start paying.

The proposal has a long and cross-cutting history. It was advocated by economists of liberal persuasion — Milton Friedman set it out in Capitalism and Freedom in 1962 — and by economists of quite different schools. In the United States it came close to adoption: the Family Assistance Plan proposed by the Nixon administration in 1969, a version of the idea, passed the House and stalled in the Senate.

Why they are the same thing

Compare the two mechanisms on an ordinary person.

With a basic income: they receive a thousand a month regardless. If they earn, they pay income tax on the earnings. The year-end position is: twelve thousand, minus tax.

With a negative income tax: they receive nothing up front. At year end their income is calculated, the formula is applied, and if they are below the threshold they receive the difference. The position is the calculated transfer, which with the right parameters is exactly the same amount as before.

Two routes, one destination. With equivalent parameters — same threshold, same withdrawal rate — the economic result is identical, and economists have agreed on this for decades.

The difference is not in how much, but in when and how.

The differences that actually matter

The moment of payment. This is the most important difference and the least discussed. A basic income arrives every month, in advance. A negative income tax arrives as a reconciliation, after the year's income is known.

For people with savings, the difference is an accounting one. For people without, it is everything. Someone who cannot pay the rent in March is not helped by a reconciliation arriving the following year. The value of a floor lies in its immediacy, and a floor that arrives late does not prevent the fall.

Versions with monthly advances based on predicted income exist, but they introduce a known problem: if actual income diverges from the prediction, you have to pay back. Asking a low-income household to return money already spent is, in the experience of countries that have tried similar mechanisms, a serious source of hardship.

Verification. A negative income tax requires knowing everyone's income, and therefore requires declarations, checks and an assessment apparatus. A basic income does not: it requires knowing who is resident.

It is true that a basic income also needs a functioning tax system for recovery, but the difference is that recovery happens through ordinary income tax, which already exists, rather than through a dedicated procedure.

Political visibility. A basic income is a payment every citizen sees arrive every month. A negative income tax is a line in a tax return.

That apparently cosmetic difference has enormous consequences for the measure's political survival. A benefit visible to everyone creates the constituency that defends it. An invisible benefit, concerning only people below a threshold, falls into the category of measures for the poor — with everything that implies about stigma and vulnerability to cuts.

It is paradoxical, but it is probably the main reason why the negative income tax, though cheaper on paper, is less robust in reality.

Apparent cost and real cost

The argument heard most often for the negative income tax is that it costs less: you pay only people who need it, instead of paying everyone and clawing back.

That is true of the gross flow. It is not true of the net cost to the public finances, which with equivalent parameters is the same.

The difference is purely one of accounting: in the first case the state collects and pays two sums that partly cancel, in the second it records only the balance. Which is why comparisons between the two proposals based on totals distributed are meaningless, and also why basic income «looks» enormously more expensive.

One side effect of that accounting difference deserves attention: in a European context of fiscal rules, the accounting treatment is not neutral. A measure that appears as enormous expenditure, even if largely offset by higher revenue, meets obstacles that a measure recorded net does not.

A third mechanism, less well known

An intermediate variant deserves a mention: the refundable tax credit.

It works like an ordinary tax allowance with one difference: if the amount exceeds the tax due, the difference is paid out rather than lost. Several countries use versions of it for families with children or for low-paid workers.

It is interesting because it shows that the principle of an unconditional transfer is already inside European tax systems, in limited form and under another name. The distance between a universal refundable credit and a basic income is, technically, far smaller than the debate suggests.

That also suggests a route to gradual introduction: start with a modest refundable credit, extended to everyone, and raise it over time. Less spectacular than a reform in one move, and probably more feasible.

What to choose

If the two proposals are economically equivalent, the choice comes down to a judgement about which differences weigh more.

Anyone prioritising accounting efficiency and lower visibility of spending will prefer the negative income tax. Anyone prioritising certainty for the recipient, administrative simplicity and political defensibility will prefer the basic income.

This site argues for the second, for the reason set out repeatedly: a measure everyone receives is a measure everyone defends, and over decades that counts for more than any consideration of accounting efficiency.

But it is worth recognising that the negative income tax is not the proposal of people who are against. It is the same proposal with a different mechanism, advocated by people who weight the same variables differently. Treating it as the enemy is a tactical error as well as an intellectual one: in a parliamentary discussion, supporters of the negative income tax are the most natural allies basic income can have.

How to tell them apart in practice

A closing observation for anyone assessing a concrete proposal.

If the text provides for a periodic advance payment, you are looking at a basic income, whatever words are used. If it provides for a year-end reconciliation, you are looking at a negative income tax, even if the document calls it a basic income.

It is a distinction you can read in two lines, and it determines whether the measure will be of any use to people without savings.

One last recommendation concerns hybrid versions, which provide monthly advances based on predicted income with a final reconciliation. They are the most common in technical proposals, and they conceal a problem: if actual income exceeds the prediction, the person has to repay. Any proposal involving reconciliation should state explicitly what happens when the reconciliation is negative.

Why the choice of mechanism is not technical

The discussion between basic income and negative income tax is presented as a matter for specialists, and that removes it from public debate. It is a mistake, because the choice of mechanism determines who sees the measure, who defends it and how long it survives.

Deciding whether a transfer arrives monthly in an account or appears as a line in a tax return is not an accounting question. It is a decision about how politically rooted that measure will be, and it deserves the same attention as the amount.

Why the distinctions matter

Much of the confusion in this debate comes from words used loosely. «Basic income» covers two proposals that lead to opposite societies. «Unconditional» is read as «without rules». «Universal» is confused with «identical everywhere». «Cost» is quoted gross when only the net figure means anything.

None of this is pedantry. Each of those confusions produces a specific misunderstanding, and each misunderstanding produces an objection that would not otherwise exist.

Anyone wanting to argue this case usefully should spend the first two minutes of any conversation establishing which proposal is under discussion. It is time that looks wasted and is not: without it, the following twenty minutes are spent answering objections to something nobody is proposing.

In brief

This article addresses one part of the problem, not the problem. A basic income creates no jobs, teaches no trades, does not fix pensions and does not replace the services that answer unequal needs. The claim argued on this site is narrower: that it is, among the available instruments, the one that makes the others workable. Training requires being able to live while training; changing occupation requires being able to be wrong; refusing indecent conditions requires being able to afford refusal.

Three objections remain standing, and this site gives each of them a page: the cost, which is real and requires serious fiscal choices; the effect on rents in markets with inelastic housing supply; and the absence of a credible transition plan. None of them shows the proposal is wrong. All three show it is not ready, which is why the demand made here is not immediate introduction but a serious European trial and a public study putting costs, routes and losers on the table.

If anything on this page is wrong or badly argued, telling us is the most useful contribution available: the address is on the Contact page, and reasoned corrections are published.