Payment Gateway Orchestration with Dynamic Fees & Tax Engine
Multi-provider payment routing with real-time fee calculation, multi-jurisdiction tax compliance, and currency conversion optimization.
The Challenge
A cross-border commerce platform sold into 40+ jurisdictions but used a single payment provider hardcoded with flat 3.4% fees. Tax was calculated manually in spreadsheets, frequently wrong on EU VAT-inclusive pricing, and silently non-compliant in markets like Malaysia (SST) and Australia (GST). Refunds and partial captures broke reconciliation. FX conversion happened at checkout with no booked rate, creating nightly ledger variance that finance spent days untangling each month.
The Engineered Solution
Jampuk Intelligence deployed a Polyglot Payment Orchestration Layer with a Deterministic Fee & Tax Engine and Vault-backed provider vault.
- → Provider Abstraction: Unified adapter interface wraps Stripe, Adyen, FPX, iDEAL, UPI, and BNPL. Smart router picks least-cost provider by BIN, amount, and region.
- → Fee Computation Engine: Applies interchange++, blended, tiered, and flat-rail fees per transaction. Every receipt itemizes gateway cost so merchants see true margin.
- → Tax Jurisdiction Engine: Maintains a versioned rule registry for VAT/GST/SST/DST with inclusive/exclusive handling, threshold monitoring, and automatic rate updates.
- → FX & Reconciliation: Books conversion rates at authorization, captures at settlement, and emits nightly reconciliation ledgers matched to order IDs with zero manual intervention.
Payment Orchestration Pipeline
From provider vault to compliant, reconciled settlement across borders
Provider Onboarding & Vault
Stores Stripe, Adyen, FPX, and BNPL credentials in HashiCorp Vault with per-environment token rotation
Transaction Routing & Auth
Smart-router selects least-cost provider by card BIN, amount, and region; initiates 3-D Secure where mandated
Fee & Tax Computation
Applies interchange++ percentages, flat rail fees, and multi-jurisdiction tax (VAT/GST/SST) with inclusive/exclusive handling
Settlement & Reconciliation
Captures funds, converts FX at booked rates, and emits reconciliation ledgers matched to order IDs nightly
Core Benefits & System Outcomes
Measured payment orchestration outcomes with full fee transparency
Multi-Provider Gateway Abstraction
One integration surface for Stripe, Adyen, local rails (FPX, UPI, iDEAL), and BNPL providers. Smart routing cuts effective processing cost by 18-34% versus single-provider lock-in.
Dynamic Interchange++ Fee Engine
Computes blended, tiered, and interchange++ fees per transaction in real time. Flat rail fees, percentage margins, and merchant-funded installment costs are itemized transparently on every receipt.
Multi-Jurisdiction Tax Compliance
Calculates VAT, GST, SST, and digital-services tax per destination with correct inclusive/exclusive treatment. Rules update automatically as thresholds and rates change across 40+ jurisdictions.
Payment Gateway Fee & Tax Engine
Select a product size, destination, and payment method to observe real-time fee, tax, and shipping calculations through the multi-provider gateway.
1 Select Product
2 Shipping Destination
3 Payment Method
> Select options and click Calculate Checkout to observe the fee engine...
Orchestrate Your Payments With Full Fee Transparency
Speak directly with AI steward & systems architect Hafiz Zainudin to scope a fixed-price payment orchestration delivery with dynamic fee and tax computation built in.