Trust Bank + FSMOne: The CPF & SRS Two-Platform Strategy for Singapore Investors (2026)

A 2.40% p.a. cash sleeve paired with a CPF-OA and SRS growth engine — here is how the two platforms fit together.

Trust Bank’s Flex Plan pays up to 2.40% p.a. on cash you might otherwise leave idle, while FSMOne lets you invest CPF Ordinary Account (OA) savings above S$20,000 and SRS funds through unit trusts and ETFs. Used together, Trust Bank covers your liquid buffer and FSMOne puts your CPF-OA and SRS money to work — two jobs, two platforms, each doing what it does best.

Not financial advice. All figures are for educational reference only. Data as at August 2026 unless noted.

Table of Contents

What Makes This Combo Work

Most “two-platform” guides pair a digital bank with a cash-only broker like IBKR. That works well for your take-home pay. But it does nothing for two pools of money most Singaporeans forget about: your CPF Ordinary Account (OA) balance above S$20,000, and any Supplementary Retirement Scheme (SRS) contributions sitting idle.

Here is why Trust Bank and FSMOne pair up differently. Trust Bank is a cash account — no CPF, no SRS, just SGD savings with a strong headline rate. FSMOne is one of the few platforms in Singapore that accepts both CPF-OA funds (through a CPF Investment Account, or CPFIA) and SRS funds directly for unit trusts, ETFs, and bonds. IBKR, by contrast, is cash-only and cannot touch either pool.

That split — liquid cash on Trust Bank, CPF-OA/SRS growth on FSMOne — means each platform is doing the one job it is actually built for. You are not forcing a cash-only broker to hold money it cannot legally accept.

Trust Bank Flex Plan — Your Cash Sleeve

Trust Bank’s savings account runs on what it calls the Flex Plan. Everyone starts at a base rate of 0.05% p.a. — barely better than a shoebox. However, each month you can pick any 3 “bonus scoops” from a menu of about 8 (spending on your Trust card, crediting your salary, topping up Trust Invest, and so on). Hit 3 scoops and your rate jumps to up to 2.40% p.a., applied on balances up to S$1,200,000.

There is no lock-in, no minimum balance, and no monthly fee. You can also change your 3 scoops every month through the Trust app, so the account flexes with your spending habits — hence “Flex Plan”.

Source: Trust Bank official Flex Plan rates, verified August 2026.

The gap between base and boosted is not trivial. On S$24,000 — a realistic 4 to 6 month emergency fund for many households — hitting your 3 scoops earns you S$564 more a year than doing nothing. That is a free upgrade, not a reward for taking on risk.

FSMOne CPFIA & SRS — Your Growth Engine

FSMOne (run by iFAST) supports two account types most brokers ignore: a CPF Investment Account (CPFIA) for CPF-OA money, and a direct SRS account for your SRS contributions.

For CPF-OA, you first need a CPF Investment Account opened through an agent bank — DBS, OCBC, or UOB. FSMOne does not remove this step; it simply links to whichever agent bank CPFIA you already hold. Once linked, you can buy CPFIS-included unit trusts on FSMOne with 0% sales charge and a 0.35% p.a. platform fee for most equity and multi-asset funds (0.20% p.a. for fixed income funds). For SRS, the account sits directly with FSMOne, no agent bank needed, and covers unit trusts, ETFs (S$8.80 flat SGX trade fee), and bonds.

Source: FSMOne (iFAST) fee schedule for CPFIS/SRS unit trusts, verified August 2026.

That fee eats into returns, so it only makes sense if the underlying investment can realistically clear both the fee and the return you are giving up by not leaving the money where it already earns a guaranteed rate. That is the real question for CPF-OA, and it deserves its own section.

The CPF-OA Hurdle — Why 2.5% Is a Real Floor

Here is the honesty point most “invest your CPF” articles skip. CPF-OA already earns a guaranteed 2.5% p.a. — set by CPF Board, not a bank promotion that can be cut next quarter. That is a genuine floor. SRS cash, by contrast, earns close to 0% sitting idle at most banks. The two are not the same decision.

You can only invest OA savings above the first S$20,000, which CPF Board requires you to keep in cash for liquidity. So the real question is: for the amount above that S$20,000 floor, can an FSMOne-held fund beat 2.5% p.a. by enough to justify the 0.35% p.a. fee and the market risk you are taking on?

Using an illustrative 6% p.a. gross return (not guaranteed, and funds can also lose money) minus the 0.35% p.a. FSMOne fee, a S$30,000 investable CPF-OA buffer nets 5.65% p.a. Over 20 years, that gap between the guaranteed 2.5% and the invested 5.65% compounds to roughly S$40,900. Over 30 years it widens to about S$93,100.

That said, those figures assume the fund actually delivers 6% p.a. gross, year after year, which is not guaranteed. If you are not comfortable with your CPF-OA balance dipping below the guaranteed floor in a bad year, leaving it at 2.5% is a completely reasonable choice. The math favours investing over the long run, but only if you can stomach the ride.

Step-by-Step: Setting Up Both Platforms

Trust Bank (cash sleeve):

1. Sign up for a Trust Bank account using referral code HTWYQP95 — this also gets you a welcome scratch card (minimum S$5, up to S$1,000).
2. Fund your account and set up salary crediting or PayNow/GIRO as needed.
3. Each month, open the Trust app and select your 3 bonus scoops before the cut-off to lock in the boosted rate.

FSMOne (CPF-OA and SRS growth engine):

1. If you do not already have a CPF Investment Account, open one through DBS, OCBC, or UOB — this is a CPF Board requirement, not an FSMOne one.
2. Open an FSMOne account and link your CPFIA (for CPF-OA) or open the direct SRS account (for SRS contributions).
3. Fund the account and select CPFIS-included or SRS-eligible unit trusts, ETFs, or bonds based on your risk profile.

Who Should (and Shouldn’t) Use This Strategy

This combo suits you if you already have more than S$20,000 in CPF-OA, some SRS contributions sitting idle, and you are comfortable meeting Trust Bank’s 3-scoop condition every month. It also suits you if you want a clean split: emergency cash in one place, retirement-linked growth money in another.

It does not suit you if you cannot reliably hit 3 scoops (you will earn the 0.05% base rate instead, no better than most banks), or if you are not ready to see your CPF-OA balance fall below the guaranteed 2.5% p.a. floor in a weak market year. In that case, leaving CPF-OA untouched and just using Trust Bank for cash is a perfectly sound choice.

Frequently Asked Questions

Related Reading

For a deeper dive into CPF-OA investing more broadly, see our CPF investment strategy guide. If you are comparing digital banks beyond Trust Bank, our GXS vs Trust Bank vs MariBank comparison breaks down all three, and our Trust Bank interest rate guide covers every scoop option in detail. For the SRS side of this strategy paired with a different cash sleeve, see our FSMOne + GXS Bank CPF & SRS strategy. Run your own numbers with our Retirement Planning Calculator and CPF Interest Calculator.

External sources: Trust Bank official Flex Plan rates, CPF Board OA interest rate, and SDIC deposit insurance scheme.