Why is the SSS Flexi-fund a good investment?
Flexi-fund contributions are invested entirely in government securities. Interest earnings are computed based on the average 91-day Treasury bill rate, thus ensuring a transparent, high-yielding and risk-free investment of members' hard-earned income abroad.

Who may enroll in the Flexi-fund Program?
The Flexi-fund Program is exclusive to OFW members who are paying contributions based on the prevailing maximum monthly salary credit (MSC) under the regular SSS coverage program. Enrollment is done using SS Form OW-1, indicating application for Flexi-fund membership, to be submitted to any SSS Foreign Representative office . Local SSS branches also accept OW-1 forms but will require registrants to present valid Overseas Employment Certificate (OEC) or E-receipt issued by the POEA as proof of pending deployment.

How can OFWs contribute to the SSS Flexi-fund?
Contributions can be made anytime, provided the Flexi-fund member has paid the maximum monthly SSS contribution (currently at P1,560) for the applicable period. Any amount, not less than P200, paid in excess of the required contribution will be posted to the member's Flexi-fund account and earn interest (e.g., if total payment for applicable month of January is P2,000, the amount of P1,560 will be for regular SSS and P440 for Flexi-fund).

Can Flexi-fund deposits also be withdrawn? What are the requirements?
Flexi-fund members may opt to apply for early withdrawal of their accumulated funds, either in full or partial lump sum, in case of urgent financial needs. Pre-termination fees, however, will be imposed on withdrawal of contributions that have stayed in the Fund for less than a year.

For all Flexi-fund benefit claims, including early withdrawals, use SS Form DDR-2, which is also downloadable from the SSS website. This should be submitted to any local SSS branch, together with 1x1 ID picture and photocopy of SSS digitized ID card or passport, for claim settlement.

Info Taken from: https://www.sss.gov.ph/sss/index2.jsp?secid=812&cat=7&pg=null