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Module 1: What R&D incentives are

Credits, offsets and deductions, how each one reaches the tax bill or the bank account, and what the seven schemes have in common.

R&D Tax FundamentalsLast reviewed 2 October 2026

After this module you will be able to explain the three forms an R&D tax incentive can take, follow each one from the eligible costs to the tax bill or the bank account, and recognise the features the seven schemes share, so that any country page on this site makes sense on a first reading. Finance teams who want the calculation detail should continue to Scheme mechanics in the In-House Finance Team Program.

What this module covers

  • What an R&D incentive rewards and why it runs through the tax system.
  • The three forms of benefit: a credit, an offset or payable credit, and an enhanced deduction.
  • How a benefit reaches the company: a smaller tax bill, a cash payment, or a carry to another year or another tax.
  • What happens when there is no tax to pay.
  • The features every scheme has in common, and the four points on which the seven countries differ.

What the incentive rewards

Every one of the seven schemes does the same basic thing. It takes money a company has already spent on research and development and returns part of it through the tax system. Governments do this to encourage more R&D than companies would fund on their own, and they use the tax system because every company already files a return.

Three consequences follow for a beginner. First, the incentive is a tax claim: it is made in, or alongside, the tax return, and it uses the tax authority's definitions, not the company's. Second, it rewards spending that has already happened, so the claim is prepared after the year end even though the records that support it are made during the year. Third, the tax authority can review the claim afterwards like any other entry in the return, which is why the later modules spend so much time on evidence.

Three forms of benefit

A credit is a percentage of the eligible costs, subtracted directly from the tax the company owes. A credit of 100 reduces tax by 100. Whether it is worth anything to a company with no tax to pay depends on whether the scheme makes it refundable, lets it be carried to another year, or lets it be set against a different tax.

An offset or payable credit works like a credit but is designed to be paid out in cash when it exceeds the tax due. The cash element usually comes with a condition, such as a turnover limit, a cap linked to the payroll taxes the company has paid, or payment spread across instalments.

An enhanced deduction does not touch the tax bill directly. It increases the amount deducted from taxable profit, so its value is the extra deduction multiplied by the company tax rate. As illustrative arithmetic, an extra deduction of 100 at a tax rate of 20% is worth 20 in tax saved. This is why deduction schemes quote large percentages that cannot be compared with credit rates until both are converted into tax saved.

Form of benefitHow it is calculatedHow it reaches the companyWhat to check first
CreditA rate applied to eligible costs, sometimes only to costs above a base amountSubtracted from the tax due for the yearWhether unused credit is refunded, carried forward or set against another tax
Offset or payable creditA rate applied to eligible costsSubtracted from tax, with the excess paid in cash subject to conditionsThe turnover limit, payroll cap or instalment rule that governs the cash
Enhanced deductionEligible costs multiplied by an uplift percentageA larger deduction and a smaller taxable profitThe company tax rate, whether there is profit to absorb it, and whether a cash option exists

Tax bill or bank account

Follow the money and there are only three destinations. The benefit can reduce the tax due for the year, which helps a profitable company at the point the return is processed. It can be paid out in cash, which is what makes a scheme useful to a loss-making or pre-revenue company, and which is where turnover limits, payroll caps and instalment rules appear. Or it can be carried: forward to a later year, back to an earlier one, or across to a different tax such as payroll tax.

Timing follows the route. A reduction in tax arrives when the return is processed. A cash payment arrives when the tax authority pays it, which may follow the return, follow a registration or approval step, or be spread across more than one year. Module 4 sets these steps in order.

What the seven schemes have in common

Beneath the different names and rates, the seven schemes are built from the same parts, and the rest of this program takes them one at a time.

  1. A definition of R&D built around a scientific or technological uncertainty and systematic work to resolve it. Module 2.
  2. A list of eligible cost categories, with staff costs the largest in most claims, and rules for contractors, materials and overheads. Module 3.
  3. A claim made in or alongside the tax return, in some countries after a registration, notification or approval step. Module 4.
  4. An expectation of records that show the uncertainty, the work done to resolve it and the costs, made at the time rather than reconstructed later. Module 5.
  5. A review power, under which the tax authority can ask for those records and reduce or recover the benefit if they do not support the claim.
  6. A preference for work done in the country, expressed through limits on overseas and contracted costs that vary in strictness.

The schemes differ on four points: the form of the benefit, its rate, whether and how it can be paid in cash, and whether anything must be filed before the claim. The table below covers the first, third and fourth; the comparison page sets the rates side by side.

Illustrative example

Illustrative example. Harbour Robotics Ltd, a hypothetical company, spends 100,000 on eligible costs in a year. Under a credit scheme at the New Zealand rate of 15% of eligible R&D expenditure, the credit is 15,000. If the company owes 10,000 in income tax, the credit removes that bill and leaves 5,000, which is refundable in some cases, with refunds capped including by reference to labour-related taxes, or otherwise carried forward (see refundability in New Zealand). Under a deduction scheme, if the same 100,000 were all staff costs and consumables for R&D carried out in Singapore, the 400% deduction on the first S$400,000 gives a deduction of 400,000. At the Singapore corporate income tax rate of 17 percent that deduction is worth 68,000 in tax, of which 17,000 is the ordinary deduction any business expense would earn, so the incentive itself is worth 51,000, provided the company has enough taxable profit to absorb it (see enhanced deductions in Singapore). Same spend, two mechanisms, and neither figure means anything until the profit position is known.

Across the seven countries

CountryForm of benefitCash when there is no tax to payStep before the claim
United StatesIncome tax creditNot refundable. Qualified small businesses can elect to apply up to US$500,000 a year against payroll taxNo pre-registration
United KingdomTaxable expenditure credit. ERIS gives an additional deduction and a payable creditPayable credits are capped at £20,000 plus 300% of the company's relevant PAYE and National Insurance liabilitiesClaim notification in some cases; an additional information form with every claim
IrelandCorporation tax credit, payable in instalmentsYes. The credit is paid in three instalmentsAdvance notification for a first claim or no claim in the previous 3 years
CanadaInvestment tax credit, and a deduction against incomeFor most CCPCs at the enhanced rate, current expenditure is 100% refundableNo registration. Optional pre-claim approval has been available since 1 April 2026
AustraliaTax offsetRefundable offset for aggregated turnover under A$20 millionRegister R&D activities with the department within 10 months of the end of the income year
New ZealandTax creditIn some cases. Refunds are capped, including by reference to labour-related taxesGeneral approval, or criteria and methodologies approval, for the income year
SingaporeEnhanced tax deduction, with an optional cash payoutOptional cash payout, up to S$20,000 a year, with conditionsNo registration

Where to go next

Self-check questions

Answer each question, then open it to compare.

A company has spent 100,000 on eligible costs. Why can you not say what the incentive is worth until you know which form the benefit takes?
A credit or offset is a percentage of the costs subtracted from tax, so its value is the rate times the costs. An enhanced deduction only reduces taxable profit, so its value is the extra deduction times the company tax rate, and it is worth little in a year with no profit unless the scheme offers a cash option.
What are the three routes by which a benefit can reach a company, and which one matters most to a loss-making company?
It can reduce the tax due for the year, it can be paid out in cash where the scheme makes it refundable or payable, or it can be carried to another year or set against another tax. A loss-making company has no tax to reduce, so the cash route and any cap on it decide whether the claim is worth anything this year.
Name three features that all seven schemes share.
Each has a definition of R&D built on a scientific or technological uncertainty addressed through systematic work, a list of eligible cost categories, and a claim made in or alongside the tax return. Each also expects records to support the claim and gives the tax authority the power to review it afterwards.
Which of the seven countries require a registration or approval step every year before the benefit can be claimed?
Australia, where R&D activities are registered with the department within 10 months of the end of the income year, and New Zealand, where approval comes before the claim. The United Kingdom and Ireland ask for advance notification only in some cases, and the United States, Canada and Singapore have no registration.
Why is an incentive quoted as a 400% deduction not four times as generous as one quoted as a 100% credit?
The two percentages measure different things. A deduction percentage is applied to taxable profit and then multiplied by the tax rate, while a credit percentage is applied directly to the tax bill. Only after converting both into tax saved can they be compared, and even then the profit position and any cap change the answer.

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Educational content only, not tax advice. See the disclaimer.