An incentive where the recipient can receive additional funding for the purchase/lease of the good/service, which must be paid back.

An incentive that reduces the purchase/lease cost of the good/service in question.

An incentive that directly reduces the amount of tax owed by the recipient.

An incentive that reduces the recipient's amount of taxable income.

An incentive that reduces/exempts the recipient from taxation applicable to the incentivized good/service (e.g. luxury taxes, registration taxes, circulation tax).