If my SA is full, and I'm still working, will the SA contribution flow over to MA? Or will it flow to OA instead?

Hi Anon!

Since you highlighted 'still working', there's technically no limit for your mandatory SA contribution, so they'll still stay there.

The current limits in place are for voluntary contributions or RSTU.

For RSTU, if you're below 55 years old, you'll only be able to top-up to the current FRS. But if you're above 55 years old, you'll be able to top-up to the current ERS instead.

On the other hand, if you're making voluntary contributions, the limit is the CPF Annual Limit, currently at $37,740.

Hope this helps!