RPGT calculate based on your net profit of the amount you earn to tax it.
It's can after deducted lawyer fees, agent commission, only calculate your tax amount.
REAL PROPERTY GAINS TAX FOR 2014 Tax Rates
Personal (citizen & PR) Company
Disposed within 3 years 30% 30%
Disposed in 4th year 20% 20%
Disposed in 5th year 15% 15%
Disposed after 5 years 0% 5%

For non-citizen, disposal within 5 years is subject to a flat RPGT of 30%. Disposal after 5 years, RPGT is at 5%.

If you want to skip for RPGT, the only thing u can do is hold your house until 5 year.