Private property owners have a wider set of refinancing strategies available — including cash-out refinancing and decoupling — because only TDSR (55% of gross income) applies, not MSR. That flexibility also means more variables to weigh: larger loan quantums, bigger absolute savings, and bigger absolute penalty costs if the timing is wrong.
Larger loan sizes mean small rate differences translate into large dollar savings — but also make legal, valuation, and penalty costs more consequential to the breakeven calculation.
Cash-out refinancing is available for private property in ways it generally isn't for HDB.
Fixed vs. floating decisions matter more given larger absolute exposure to rate movements.
Outstanding loan and current rate, remaining lock-in, valuation, and your objective (lower repayment vs. cash-out) — then a like-for-like comparison of packages across banks, with the real breakeven timeline.