B2B Virtual Card Infrastructure for Durianpay

How Durianpay Works

Looking at their flow diagram, here is how payments move through their system:

1. Collection Phase: Payments from customers (like User A or User X) go straight into Durianpay's bank accounts (Bank Account A or Bank Account X).
2. Webhook Trigger: Once the bank receives the cash, it fires a payment notification directly to Durianpay's webhook.
3. System Processing: The webhook triggers Durianpay's core system to do three things at once:

• Balance Management: Updates live balance ledgers for master and sub-accounts.
• Sub-account Model: Splits the revenue automatically, deducts platform fees, and separates the net funds for each branch or sub-account.

Virtual Corporate Cards Features

Durianpay clearly targets established B2B enterprises (Perseroan Terbatas / PT) instead of chasing low-margin UMKMs. These bigger corporate clients handle complex supply chains, multiple branches, and massive monthly operational expenses.

In real life, big PT enterprises face constant operational headaches. Imagine a marketing team needing Rp 500 million tonight to keep Facebook Ads running, or a tech team needing to pay an urgent $20,000 AWS server bill. Currently, most finance teams have two bad options:

• Option A: Use one or two physical corporate credit cards shared unsafely across multiple managers and departments.
• Option B: Wait T+1 or T+2 business days to withdraw incoming payment gateway funds to a traditional corporate bank account before paying vendors.

Option A is a massive security risk, and Option B creates cash flow lag that can halt ad campaigns or delay vendor payments.

Upgraded Balance Management Flow

To fix this, Durianpay can expand its balance structure by introducing Virtual Corporate Cards. It's basically a virtual credit card that can be used within the Durianpay ecosystem.

Looking at the new balance management diagram above, incoming revenue flows from various sub-accounts directly transferred into the main Company A Master Account. From there, the Master Account splits funds into two clean categories:

1. Outbound Spend (Virtual Cards): Dedicated, single-purpose virtual cards for specific corporate expenses.
2. Reserves (Withdrawal Vault): 20% of balance kept liquid for traditional bank payouts.

Why This Product Expansion Win-Win Solution

Adding Virtual Corporate Cards creates huge value for both the client and Durianpay:

Advantage for Clients:

1. No T+2 waiting time or lost yield: Teams can spend instantly from their clearing balances without waiting for bank withdrawals, while unspent funds keep earning daily interest in treasury accounts.
2. Seamless accounting and clear audit trails: Every card is tagged to a specific department or vendor, making expense tracking and month-end reconciliation effortless for finance teams.
3. Better security: Each virtual card gets its own unique card ID, limit, and merchant lock. If a card is compromised, finance can freeze just that single card without disrupting the rest of the company.

Advantage for Durianpay:

1. New revenue stream: Durianpay earns transaction fees (interchange) every time a client spends money using a virtual card.
2. Deep ecosystem lock-in: Once both incoming collections and outgoing company expenses are fully integrated into Durianpay, switching to another payment gateway vendor becomes much harder for the client.

Virtual Card Rules & Generation

To make Virtual Corporate Cards work in real life, the system needs to be simple for the client to set up, backed by the right financial partners, and works like a credit card.

Here is how a company actually sets up and reserves funds for a specific expense inside Durianpay:

1. Card Generation: A finance admin logs into Durianpay and creates a new Virtual Card in seconds.
2. Purpose & Merchant Locking: The admin tags the card for a specific purpose (for example: "AWS Infrastructure" or "Meta Ad Spend"). They can lock the card so it only works with that specific merchant.
3. Budget Allocation: The admin assigns a dedicated budget (like Rp 5 billion) directly from the Master Account into that Virtual Card's sub-ledger.
4. Custom Controls: They set monthly spending limits, expiry dates, and auto-approval rules for 3D Secure OTPs.

By issuing single-purpose virtual cards, finance teams get total control over corporate budgets before the money is even spent.

Partnership With Visa

Durianpay cannot issue Visa cards alone. To make this operationally seamless and legally compliant in Indonesia, Durianpay needs to build a 3-way partnership stack:

• Card Rail Network (Visa / Mastercard): Provides the global payment infrastructure so merchants worldwide can accept the virtual card.
• Issuing Bank / BIN Sponsor (e.g., Bank Mandiri, CIMB Niaga, Permata): The licensed Tier-1 bank holding the Bank Identification Number (BIN). They handle the regulatory reporting under Bank Indonesia and OJK.
• Issuer Processor (e.g., Galileo, Marqeta, Thredd): The API middleware that bridges Visa's network messages directly into Durianpay's real-time software engine.

Step-by-Step Payment Flow

Looking at the virtual card payment flow diagram, here is what happens behind the scenes in less than two seconds when a vendor charges a card:

1. Charges Virtual Card: The merchant (like AWS or Meta) initiates a charge against the virtual card.
2. Forwards Request: The Visa Network receives the charge request and routes it directly to the Issuing Bank.
3. Request Approval: The Issuing Bank sends a real-time API webhook request to Durianpay to verify the transaction.
4. Approved & Balance Freeze: Durianpay instantly checks if the client has enough balance and meets all spending rules. If everything checks out, Durianpay freezes the exact amount in the client's ledger and sends back an "Approved" signal to the Issuing Bank.
5. Pay Merchant: The Issuing Bank confirms the authorization to the Visa Network.
6. Forward Funds to Merchant: The Visa Network forwards the approved payment to the merchant, completing the checkout smoothly ⚡

Because Durianpay uses a software hold in Step 4, physical cash doesn't leave the bank account instantly at T+0. This guarantees the merchant gets paid while allowing the client to keep earning interest on their unspent funds until final settlement happens!

Closing

That's it! to summarize, the purpose of Virtual Card is to serves Durianpay target market (Big Enterprises) and solves the needs to pay the expense while seamlessly helps Enterprises to still maintains interest, accounting ledger, and balance segregation. Thank you for reading😊