noun
tax-free income
Refers to income that is exempt from taxation under relevant laws.
この制度では、一定の条件を満たすと免税所得が認められます。
Under this system, tax-free income is recognized when certain conditions are met.
課税所得 is taxable income, the opposite of 免税所得.
Compound of 免税 (tax exemption) and 所得 (income).