1) Assessable 2) Dutiable 3) Like luxury goods 4) Like much income 5) Like some income 6) Like sweepstakes winnings 7) Nonexempt 8) Of interest to the IRS 9) Ratable 10) Rateable 11) Subject 12) Subject to assessment 13) Subject to taxation 1) Assessable 2) Dutiable 3) Nonexempt 4) Ratable 5) Rateable 6) Subject 
• (a.) Capable of being taxed; liable by law to the assessment of taxes; as, taxable estate; taxable commodities. • (a.) That may be legally charged by a court against the plaintiff of defendant in a suit; as, taxable costs.
Income and gains are taxable if they are liable to income tax or capital gains tax under the tax statutes. 
Tax'a·ble adjective 1. Capable of being taxed; liable by law to the assessment of taxes; as, taxable estate; taxable commodities. 2. (Law) That may be legally charged by a court against the plaintiff of defendant in a suit; as, taxable costs. -- 
[adj] - (of goods or funds) subject to taxation
Income and gains are taxable if they are liable to income tax or capital gains tax under the tax statutes.
adjective (of goods or funds) subject to taxation; `taxable income`; `nonexempt property`