Why 35 years has a lower monthly payment
A mortgage spreads principal and interest over the selected repayment period. Adding another five years gives you 60 more monthly payments, so each required payment is normally lower when the other assumptions stay the same.
The trade-off is total interest
Because the loan remains outstanding longer, a longer tenure can result in more total interest over the full life of the mortgage. That difference can be substantial on a large home loan.
Do not compare tenure in isolation
The interest rate and loan amount matter just as much. Use the same property price, down payment and rate when comparing 30 and 35 years so you can see the effect of tenure alone.
Affordability still comes first
A shorter mortgage is not automatically better if it makes your monthly cash flow too tight. Keep room for maintenance, insurance, emergencies and savings. Use the Home Affordability Calculator to check the wider budget.