What exactly is the Effective Interest Rate (EIR) in the Singapore banking context?
The EIR represents the actual yield achieved after accounting for compounding frequency and the specific tiering of your balance. Most banks like DBS Multiplier or UOB One offer headline rates of up to 4.0% or 7.8% p.a., but these figures are often weighted averages. For example, if a bank offers 5% on the first $50,000 and 0.05% on anything above that, your EIR on a $100,000 balance is significantly lower than the advertised maximum.