RTGS processes individual payments instantly with immediate settlement, while ACH batches transactions for delayed settlement. RTGS operates continuously during business hours, whereas ACH processes transactions in scheduled cycles typically 3-4 times daily.
Why It Matters
RTGS enables same-day liquidity management but costs $25-50 per transaction versus ACH's $0.25-0.50 fee. Financial institutions processing $1 billion daily can save $18.5 million annually using ACH for non-urgent payments. RTGS reduces counterparty risk by 100% through immediate irrevocable settlement, while ACH transactions carry risk until final settlement occurs 1-2 business days later.
How It Works in Practice
- 1Route high-value urgent payments through RTGS for immediate gross settlement
- 2Batch low-value routine payments into ACH files for scheduled processing
- 3Validate sufficient liquidity before RTGS execution to prevent rejection
- 4Monitor ACH settlement windows to predict when funds become available
- 5Calculate optimal payment mix to balance cost versus settlement speed requirements
Common Pitfalls
RTGS liquidity shortfalls can trigger automatic credit line draws with penalty rates of 2-5% above base rate
ACH return items processed up to 60 days later can disrupt reconciliation and require manual intervention
Regulation E dispute timeframes differ between payment types, creating compliance complexity for customer-facing transactions
Key Metrics
| Metric | Target | Formula |
|---|---|---|
| Settlement Speed | <30 seconds RTGS, 1-2 days ACH | Time from payment initiation to final irrevocable settlement |
| Cost Per Transaction | <$0.50 ACH, <$50 RTGS | Total processing fees divided by transaction volume |
| Same-Day Settlement Rate | >99.9% | RTGS successful settlements divided by total RTGS attempts |
Related Terms
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