Tan Chye Hin, 55, pleaded guilty to getting the services of the 16-year-old China prostitute in a Geylang hotel on Aug 4.
The father of three is appealing against the sentence. His $12,000 bail was upped by another $6,000.
Last month, the pimp who abetted him in the offence, Wang Minjiang, 36, was similarly jailed 12 months by the High Court after the prosecution appealed against his original fine of $8,000.