Last month, I decided to top up my CPF Special Account since that account gives me 4% yield risk free. My calculations showed that I can reduce my tax bill by $7k x 15% = $1050, without even taking into account future 4% yield benefits i’m to receive. It’s definitely worth the top up from an ROI point of view, since it’s tough to guarantee this kind of return in today’s market. There is a maximum cap for cash top-up relief per Year of Assessment (YA) which is $14,000 (Self $7,000 and family members $7,000), but at least max it out for yourself if you have the spare cash. This way you can quickly hit the CPF SA ceiling sooner, maximizing the 4% risk free yield early on. Will do it again for FY2019.