Singapore's reputation as a fintech hub rests on genuinely well-designed payment plumbing โ but "well-designed" means specialized, not simplified. A business moving SGD has to choose between four distinct rails, each built for a different combination of speed, value, and recurrence, rather than one universal pipe. Pick the wrong one and you either overpay for capacity you don't need or wait on a batch cycle for a payment that should have cleared instantly.
The short version
Singapore's payment infrastructure has historically been coordinated by the Monetary Authority of Singapore (MAS) and the Association of Banks in Singapore (ABS), with a new body โ the Singapore Payments Network (SPaN), formed in June 2025 โ now governing the schemes centrally:
- FAST โ real-time interbank SGD transfers, the workhorse behind most instant business and consumer payments.
- PayNow โ an overlay service on top of FAST that lets users pay via a mobile number, NRIC/FIN, or UEN instead of full bank account details.
- GIRO โ batch-processed direct debit and credit transfers, used for recurring payments rather than one-off transfers.
- MEPS+ โ the MAS-operated real-time gross settlement (RTGS) system, used for high-value and time-critical SGD transfers, and the ultimate settlement layer underneath FAST and GIRO.
FAST โ the real-time backbone
FAST (Fast and Secure Transfers) is Singapore's electronic funds transfer service for moving SGD between participating banks and non-bank financial institutions almost instantly, 24/7. Launched in 2014, it uses the ISO 20022 messaging standard and is owned by the Singapore Clearing House Association, with inter-participant settlement occurring on MEPS+.
- Settlement type: Real-time, transaction-by-transaction from the user's perspective
- Speed: Seconds, available 24/7/365
- Value tier: Up to S$200,000 per transaction (subject to individual bank limits) โ the default rail for urgent one-off business payments where you have the recipient's full bank account details
- What it's used for: Supplier payments, one-off transfers, refunds, payroll where speed matters
PayNow โ the addressing layer on top of FAST
PayNow doesn't move money independently; it's a proxy service that resolves a mobile number, NRIC/FIN, or UEN (for businesses) to a bank account and then executes the transfer over FAST. Functionally, a PayNow payment inherits FAST's real-time settlement and value profile โ it simply removes the need to know or share full account details. PayNow Corporate extends this to businesses via their Unique Entity Number, useful for QR-based collections and B2B payments where the payer doesn't have your account number on file.
GIRO โ batch processing for recurring, non-urgent payments
GIRO is Singapore's direct debit and batch credit-transfer system, used long before FAST existed and still the default for scheduled, recurring obligations: rent, utility bills, insurance premiums, and payroll runs where same-day (not instant) credit is acceptable. Unlike FAST, GIRO transactions are collected and settled in batches โ typically taking one to three days โ and are considerably cheaper per transaction, which is why it remains the default rail for high-volume, non-time-sensitive payouts rather than one-off urgent transfers.
- Settlement type: Batch, netted, deferred same-day settlement
- Speed: One to three business days depending on cycle and cut-off
- Value tier: No special value cap; used regardless of amount when timing isn't urgent
- What it's used for: Recurring billing, payroll, scheduled supplier payments, subscription collections
MEPS+ โ the high-value, real-time gross settlement layer
MEPS+ (MAS Electronic Payment System) is Singapore's RTGS system, operated by the Monetary Authority of Singapore. It settles large-value and time-critical SGD obligations individually, in central-bank money, with immediate finality โ and it's also the layer where FAST and GIRO's netted obligations are ultimately settled between banks. MAS designates MEPS+ a Systemically Important Payment System (SIPS), its highest oversight category.
- Settlement type: Real-time gross settlement (RTGS) โ individual, final, irrevocable
- Speed: Immediate, during MEPS+ operating hours
- Value tier: High-value, effectively uncapped โ used when payment size or urgency exceeds what FAST is built for
- What it's used for: Large corporate transfers, interbank settlement, securities and FX settlement
Comparison at a glance
| System | Role | Settlement | Speed | Value tier | Typical use |
|---|
| FAST | Real-time transfer rail | Real-time to user | Seconds, 24/7 | Up to S$200,000/txn | Urgent one-off SGD payments |
| PayNow | Proxy overlay on FAST | Same as FAST | Same as FAST | Same as FAST | Proxy-based P2P/B2B collections |
| GIRO | Batch direct debit/credit | Deferred, netted | 1โ3 business days | No cap | Recurring billing, payroll, bulk payouts |
| MEPS+ | RTGS (MAS-operated) | Real-time gross settlement | Immediate | High value, uncapped | Large transfers, interbank/FX settlement |
What this means if you're moving money in and out of Singapore
Most commercial activity โ collecting from Singaporean customers, paying local suppliers, running payroll โ runs on FAST/PayNow for anything urgent and GIRO for anything recurring and non-urgent. MEPS+ becomes relevant mainly at the edges: very large single transfers, or as the settlement backbone that makes the entire system safe, rather than something a merchant routes payments through directly.
The practical takeaway for a business choosing a payment partner: the right rail depends on the shape of the payment, not just the amount. A provider that can route between FAST and GIRO automatically โ rather than defaulting everything to the most expensive real-time channel, or everything to slow batch processing โ is doing the routing decision a finance team would otherwise have to make manually.
