If you are not working then no need to topup. But if you are, your cpf contributions will go into MA to reach the BHS for that year until you turn 65.I thought even if don't meet BHS govt won't ask you to top up. It is the max amount you can have in MA but not the Required amount. My MA is below BHS and I heck care, not working so it is only going to get lower with every year premium deductions