Take S$100,000 today and assume Singapore inflation runs at 2.5 percent a year for 20 years. To buy the same basket of goods and services in 20 years, you would need about S$163,862. Put the other way round, the S$100,000 left untouched for 20 years would have the purchasing power of only about S$61,027 in today’s money. Inflation has quietly eroded roughly 39 percent of its real value over two decades.
This is why cash sitting idle loses ground. At 2.5 percent inflation, prices roughly double about every 28 years, so even a moderate long-run rate matters a great deal over a working lifetime or a long retirement. The practical takeaway is that savings need to earn at least the inflation rate just to stand still, which is the gap between the nominal returns a compound interest calculator shows and the real spending power those returns actually deliver.
Item
Amount
Amount today
S$100,000
Future cost of the same lifestyle
S$163,862
Real value of S$100,000 in 20 years
S$61,027
How it is calculated
The tool applies compound inflation. The future cost of maintaining today’s lifestyle is the amount today multiplied by one plus the inflation rate, raised to the number of years, the same compounding maths as investment growth but working against you. The real value of that sum later is the mirror image: the amount today divided by one plus the inflation rate raised to the years, which discounts future dollars back into today’s purchasing power. Singapore core inflation has typically run around 1.5 to 3 percent over the long run, spiking higher in 2022 and 2023, so 2 to 3 percent is a common planning assumption. MAS manages inflation mainly through the exchange rate rather than interest rates. Comparing the real value here against a nominal figure from the compound interest tool shows whether your savings are truly growing.
Frequently asked questions
What inflation rate should I assume?
Singapore core inflation has typically run around 1.5 to 3 percent over the long term, though it spiked higher in 2022 and 2023. For long-term planning, 2 to 3 percent is a common assumption. The MAS manages inflation mainly through the exchange rate rather than interest rates.
How does CPF help protect against inflation?
CPF Ordinary Account earns 2.5 percent per year and the Special Account earns 4 percent. The Special Account rate has historically stayed above Singapore core inflation, which means CPF savings in the SA and Retirement Account do maintain real purchasing power over time. The government reviews CPF interest rates each year and may add extra interest for balances up to certain thresholds.
Is there a tax on inflation gains in Singapore?
Singapore does not impose capital gains tax. If an asset rises in value partly because of inflation, the nominal gain is not taxed. IRAS taxes employment income and certain business income but does not tax investment returns such as capital appreciation, dividends from Singapore companies, or interest on savings accounts. This is one reason property is a popular inflation hedge among Singapore residents.
How does the GST increase affect my inflation calculations?
Singapore GST rose from 8 to 9 percent on 1 January 2024. This one-off step-up directly pushed consumer prices higher in 2024 and feeds into CPI figures. For planning purposes, you may want to use a slightly higher inflation assumption for the near term to account for price stickiness after the GST change, then revert to the long-run 2 to 2.5 percent range for years beyond 2026.