TribeCar + Syfe + MariBank + GXS + Trust Bank: How Long Does Each Bonus Rate Actually Last? (2026)

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Why the bonus window matters more than the headline rate

Most comparisons of Singapore digital banks and cash platforms rank by headline rate alone: who pays 2.40%, who pays 0.88%, who pays a one-off bonus on top. That ranking hides the question that actually determines how much interest you collect: for how long does the elevated rate apply before it reverts to base, expires, or simply isn’t renewed? A 2.88% rate you keep for 30 days is a different product from a 0.87% bonus locked in for 12 months, even though both get marketed as “bonus interest.”

This article ranks four platforms — GXS, MariBank, Syfe, and Trust Bank — plus TribeCar as the capital-source context, by how long their bonus or promotional rate actually survives. Three distinct window shapes show up: a self-chosen window you lock in yourself (GXS), a fixed one-time window that cannot be renewed (MariBank), and a rotating or unpredictable window that the platform controls and can end without much notice (Syfe Cash+ Flexi and Trust Bank).

The 4 platforms, ranked by bonus window length

Ranked from the longest, most self-controlled window to the least predictable:

Source: GXS Savings Account page; MariBank Help Centre articles on the new-user bonus; Syfe 2026 Cash+ Flexi promo pages (multiple, several marked “Promo Ended”); Trust Bank official SC Transfer-Welcome Reward terms (ran 31 Jul-2 Oct 2026, now lapsed). Verified via WebSearch, October 2026.

GXS Boost Pocket: the longest, self-chosen window

GXS is the only platform here where the bonus window length is a decision you make, not a date the platform sets. Each Boost Pocket lets you choose a tenure of 1, 3, 4, 8 or 12 months, and GXS’s official savings page confirms the bonus and base rate are both locked for whichever tenure you pick: 0.13% p.a. bonus at 1 month, 0.34% at 3 months, 0.52% at 4 months, 0.42% at 8 months, and up to 0.87% at 12 months, each on top of the 0.88% p.a. base. A 2026 third-party review cites broadly the same tiers. There’s no separate “promo period” to track here — the rate you lock in survives for exactly as long as you chose, and GXS does not charge a penalty for early withdrawal, though withdrawing early forfeits the bonus and leaves you with only the base rate earned up to that day.

The practical takeaway: GXS gives a Singapore saver more certainty about window length than any other platform in this comparison, precisely because the window isn’t something GXS can shorten on you mid-term once it’s locked in.

MariBank: a fixed 30-day window, once only

MariBank’s new-user bonus runs for exactly 30 calendar days from the date your Mari Savings Account is successfully opened, per the official MariBank Help Centre. During that window, the rate stacks to 0.88% p.a. base plus a 1.60% p.a. new-user bonus plus a 0.40% p.a. ShopeeVIP bonus (if claimed), totalling 2.88% p.a. on the first S$100,000. After day 30, the bonus simply ends — existing customers earn no new-user bonus at all, dropping to the 0.88% base (1.28% with ShopeeVIP). Some 2026 third-party blogs cite a higher combined figure of up to 3.08% p.a., which we could not confirm on MariBank’s own pages, so we’re reporting the official 2.88% structure as the verified number.

Unlike GXS, there’s no way to extend or re-trigger this window: it’s a sign-up incentive, not a recurring feature. A Singapore saver should treat the 30-day window as a one-time boost to front-load into the account, not as the rate to budget around for the rest of the year.

Syfe Cash+ Flexi: rotating windows with gaps

Syfe runs a continuous stream of time-boxed Cash+ Flexi (SGD) promotions rather than one evergreen bonus. Searching Syfe’s own 2026 promo pages turns up several distinct campaigns, each with its own start and end date, many already marked “Promo Ended”: a 30-day boosted yield of 4.5% p.a. on balances up to S$10,000 that ran through 31 May 2026; a separate June 2026 promo offering a 4% p.a. boosted rate from 1 to 30 June; and a 60-day promo offering up to 1.3% p.a. bonus yield on the first S$25,000. The pattern is a rolling cycle of roughly 30-60 day windows, with gaps between campaigns where no elevated rate applies at all.

Cash+ Guaranteed is a separate product and worth flagging honestly: current Syfe promotional terms explicitly exclude Cash+ Guaranteed balances from eligibility for these campaigns, so there is effectively no promotional window to track for that specific product — it simply earns its contractual rate on an ongoing basis, without a bonus window either starting or ending.

Trust Bank: the least predictable window

Of the four platforms, Trust Bank’s promotional windows are the hardest to plan around. The most reliably sourced official promotion we could verify — the Transfer-Welcome Reward for customers moving personal loans or credit cards from Standard Chartered — ran from 31 July 2026 to 2 October 2026, meaning it had already lapsed as of today (15 October 2026). Beyond that, several third-party referral-code guides describe differing sign-up bonuses with conflicting amounts and end dates (one citing an October 2026 Freedom Card offer valid to 31 October 2026, others citing different codes and figures from earlier in the year). We could not independently confirm a single, currently-live, officially-dated welcome bonus at the time of writing.

This isn’t a criticism of Trust Bank’s underlying savings rates, which are separately documented in our achievable-rate coverage below — it’s a specific finding about promotional window reliability: assume nothing is guaranteed to still be running by the time you open the app, and verify directly in-app before funding an account on the strength of an advertised bonus.

Staged deployment order by window reliability

Putting the window-length ranking into a practical sequence for a Singapore saver splitting idle cash across these platforms:

Step 1 — Lock a GXS Boost Pocket tenure that matches your actual time horizon. Since the window is self-chosen and locked for its full length, decide upfront whether you need the cash in 1, 3, 4, 8 or 12 months, and pick that tenure rather than defaulting to the longest one for the highest bonus.

Step 2 — Use MariBank’s 30-day new-user bonus as a one-time front-load, not a recurring plan. Open the account, let the 30-day window run its course on up to S$100,000, and budget for the 0.88% base rate (or 1.28% with ShopeeVIP) afterward — not the 2.88% headline.

Step 3 — Check Syfe’s live Cash+ Flexi promo page before each funding decision, not just once. Because campaigns rotate on roughly a monthly cycle with gaps, the rate that applied last month may not apply this month. Cash+ Guaranteed sidesteps this entirely by having no promotional window to track, at the cost of no promotional boost either.

Step 4 — Treat any Trust Bank promo you see today as temporary until confirmed in-app. Given that a recently-dated official campaign has already ended and third-party sources disagree on current referral terms, don’t size a deposit around an advertised Trust Bank bonus without checking the live terms first.

For a deeper look at what each platform actually requires before paying its bonus at all (deposit size versus behaviour conditions), see our bonus-unlock threshold ranking, and for Trust Bank’s gap between headline and achievable rate specifically, see our real rate vs headline rate comparison.

Where TribeCar fits (and why it’s excluded from the ranking)

TribeCar is deliberately left out of the window-length ranking above because a car-sharing deposit isn’t a bank bonus with a rate that reverts or expires — it’s a refundable, non-interest-bearing security deposit tied to a rental agreement. A Singapore saver who skips car ownership frees up the capital that would otherwise sit in a vehicle down payment and monthly loan servicing; that freed capital is the pool being staged across the four platforms above, not a fifth row in the window-length table. TribeCar’s own deposit mechanics are a rental-process question, not a bonus-timing one, consistent with how every prior TribeCar-combo article on this site treats it.

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