From cheque + -able.
chequable (not comparable)
- (finance, of an account) On which cheques can be drawn.
1977, Andrew J. Allentuck, The cost of age, page 52:Ten thousand dollars is left in a 3 per cent chequable account or $9,000 in a non-chequable savings account with $1,000 held in a no-interest chequing account.