✅ Solution 1: Add a Processing Fee Line Item in Zoho Books (Recommended)

How it works: Create a dedicated "Payment Processing Fee" product/service item in Zoho Books that gets manually or automatically added to invoices before payment.

Implementation Steps:

1. Create a Fee Item in Zoho Books
   • Go to Items → New Item
   • Name: "Payment Processing Fee" or "Credit Card Surcharge"
   • Set as a Service item
   • Set tax rules appropriately (fees may or may not be taxable in your jurisdiction)
2. Calculate the Fee

   Standard Stripe rate: 2.9% + $0.30 per transaction

   Formula to pass full cost to customer:

   Fee = (Invoice Total × 0.029 + 0.30) / (1 - 0.029)

   (This accounts for Stripe also charging on the fee amount itself)

3. Add to Invoice Template

   In Zoho Books, create a custom invoice template that includes this line item. Can be added manually per invoice or via automation (see Solution 3).

Limitations:

• Requires manual calculation unless automated
• Must be applied consistently to avoid customer confusion

Reference: Zoho Books Items Help

Get started with Zoho Books at https://zurl.co/QvFrD to set up your items and invoices effortlessly.

✅ Solution 2: Use Zoho Books' Built-In Adjustment/Charge Field

How it works: Zoho Books has an "Adjustment" field on invoices that allows adding a flat or labeled charge at the bottom of an invoice.

Implementation Steps:

1. Open or create an invoice in Zoho Books
2. Scroll to the bottom totals section
3. Find the "Adjustment" field
4. Enter a label (e.g., "Processing Fee") and the dollar amount
5. This appears as a separate line on the customer-facing invoice

Pros:

• Quick and requires no new item setup
• Clearly visible to the customer

Limitations:

• Flat amount only — not percentage-based natively
• Must be calculated manually each time
• May not sync cleanly back to Trainer Central records

Reference: Zoho Books Create Invoice Help

✅ Solution 3: Automate Fee Addition via Zoho Flow or Deluge Script

How it works: Use Zoho Flow or a Zoho Books custom function (Deluge) to automatically calculate and append the processing fee whenever a new invoice is created from Trainer Central.

Implementation Steps — Zoho Flow Approach:

1. Trigger: New invoice created in Zoho Books (originating from Trainer Central)
2. Action 1: Calculate fee:

   processing_fee = (invoice_total * 0.029 + 0.30)

3. Action 2: Add line item via Zoho Books API

   POST /invoices/{invoice_id}/lineitems

   Item name: "Payment Processing Fee"
   Amount: calculated value

Implementation Steps — Deluge Custom Function:

// Zoho Books Custom Function (Deluge)
invoiceId = input.get("invoice_id");
invoiceDetails = zoho.books.getRecordById("invoices", invoiceId, "YOUR_ORG_ID");
subTotal = invoiceDetails.get("sub_total").toDecimal();

// Calculate Stripe fee
processingFee = ((subTotal * 0.029) + 0.30);
processingFee = processingFee.round(2);

// Build line item map
lineItem = map();
lineItem.put("name", "Payment Processing Fee");
lineItem.put("description", "Credit card processing fee (2.9% + $0.30)");
lineItem.put("rate", processingFee);
lineItem.put("quantity", 1);

// Update invoice
updateMap = map();
updateMap.put("line_items", list(lineItem));
response = zoho.books.updateRecord("invoices", invoiceId, updateMap, "YOUR_ORG_ID");
return response;
                

Pros:

• Fully automated — no manual calculation
• Consistent application across all invoices
• Syncs properly with CRM and Books records

Limitations:

• Requires technical setup time
• Needs testing to ensure correct sync with Trainer Central
• Must handle edge cases (refunds, partial payments)

References: Zoho Flow, Zoho Books API v3

Explore Zoho Flow for automation at https://zurl.co/FjKoY.

⚠️ Solution 4: Use Stripe's Built-In Application Fee (Developer Option)

How it works: If you have API access to your Stripe integration, Stripe supports application fees at the API level that can be added to payment intents.

Implementation Steps:

1. Access Stripe Payment Intent creation
2. Add application_fee_amount parameter:

{
    "amount": 5000,
    "currency": "usd",
    "application_fee_amount": 175
}

3. This deducts the fee from the payment before depositing to your account

Limitations:

• Requires Stripe Connect (platform accounts) — not standard merchant accounts
• Likely not accessible through Zoho Trainer Central's native Stripe integration
• Complex to implement without developer resources

Reference: Stripe Connect Collect Then Transfer

Solution 5: Bake the Fee Into Course Pricing (Simplest Long-Term)

How it works: Rather than adding a visible surcharge, increase course prices by the average processing cost and absorb the fee transparently.

Calculation Example:

Desired Revenue:  $100.00
Stripe Fee:       $3.20  (2.9% + $0.30)
Set Price At:     $103.20
                

Pros:

• Zero technical implementation required
• No legal surcharging concerns
• Cleaner customer experience

Limitations:

• Fee amount varies per transaction (flat pricing won't be exact)
• Less transparent if customers ask about pricing breakdown
• Doesn't work well for variable-price courses

For alternative payment processing, consider PayPal at https://www.paypal.com/ for flexible fee handling.