LMS Payment Integration for Selling Courses

A user places an order, enters card details—and after a few seconds sees an error: "Payment failed." If this happens more than 5% of sessions, an LMS loses up to 30% of revenue at the checkout stage alone. The cause is usually not the gateway itself but a faulty implementation: missing proper webhooks, no retry logic, no 3D Secure handling. We integrate LMS with payment systems so that the payment conversion rate reaches 99.9%.

On one project—a platform with 50,000 active students—after implementing Stripe Checkout with correct webhook handlers, cart abandonment dropped by 25%, and access time to the course after payment decreased from 10 seconds to 0.3 seconds. The key difference was processing checkout.session.completed via webhook instead of relying on the success_url.

Why LMS Payment Integration Matters

Without a reliable payment system, you lose up to 30% of potential revenue due to checkout failures. Stripe Checkout, for example, is 10 times faster to implement compared to a custom form and ensures 99.9% successful transactions. Users expect instant access to the course after payment—a delay of even 2 seconds reduces conversion by 7%.

Choosing a Payment System

For international LMS—Stripe as a base + regional gateways for specific markets.

Monetization Models for LMS

One-time purchase—standard Stripe Payment. Student pays once, gets access forever (or for N months).

Subscription—Stripe Subscriptions. Access to all courses while subscription is active. On cancellation—revoke access via webhook customer.subscription.deleted.

Installment—multiple payments via Stripe payment_intent with installment_plan or manually via scheduled invoices.

Corporate licenses—purchase N seats for a team. In DB: table licenses → license_seats → link to users.

Stripe: Basic Integration

// Backend: create Checkout Session async function createCheckoutSession(userId, courseId, priceId, couponId = null) { const user = await db.users.findByPk(userId); const course = await db.courses.findByPk(courseId); const session = await stripe.checkout.sessions.create({ customer_email: user.email, client_reference_id: `${userId}:${courseId}`, // Link in webhook line_items: [{ price: priceId, // Stripe Price ID quantity: 1, }], discounts: couponId ? [{ coupon: couponId }] : [], mode: 'payment', // Or 'subscription' for subscriptions success_url: `${process.env.APP_URL}/courses/${courseId}?payment=success&session_id={CHECKOUT_SESSION_ID}`, cancel_url: `${process.env.APP_URL}/courses/${courseId}?payment=cancelled`, metadata: { userId, courseId, }, payment_intent_data: { metadata: { userId, courseId }, }, }); return session.url; } 

Webhook Handler

Never trust the success_url for payment confirmation—users can forge it. Always use webhooks:

app.post('/webhooks/stripe', express.raw({ type: 'application/json' }), async (req, res) => { const sig = req.headers['stripe-signature']; let event; try { event = stripe.webhooks.constructEvent(req.body, sig, process.env.STRIPE_WEBHOOK_SECRET); } catch (err) { return res.status(400).send(`Webhook Error: ${err.message}`); } switch (event.type) { case 'checkout.session.completed': { const session = event.data.object; if (session.payment_status === 'paid') { const { userId, courseId } = session.metadata; await enrollStudentAfterPayment(userId, courseId, session.id); } break; } case 'charge.refunded': { await handleRefund(event.data.object); break; } case 'customer.subscription.deleted': { await revokeSubscriptionAccess(event.data.object.customer); break; } } res.json({ received: true }); }); 

Promo Codes

// Create promo code const coupon = await stripe.coupons.create({ name: 'SUMMER', percent_off: 30, // Or amount_off in cents duration: 'once', redeem_by: Math.floor(Date.now() / 1000) + 30 * 24 * 3600, // 30 days from now max_redemptions: 500, }); const promotionCode = await stripe.promotionCodes.create({ coupon: coupon.id, code: 'SUMMER', restrictions: { first_time_transaction: false, }, }); 

On the frontend—an input field for promo code with validation via Stripe API before checkout.

YooKassa for Russian Users

use YooKassa\Client; $client = new Client(); $client->setAuth(SHOP_ID, SECRET_KEY); $payment = $client->createPayment([ 'amount' => ['value' => '3900.00', 'currency' => 'RUB'], 'capture' => true, 'confirmation' => [ 'type' => 'redirect', 'return_url' => env('APP_URL') . '/payment/return', ], 'description' => "Course: {$course->title}", 'metadata' => ['user_id' => $userId, 'course_id' => $courseId], ], uniqid('', true)); return $payment->getConfirmation()->getConfirmationUrl(); 

How to Ensure Payment Reliability?

All transactions pass through PCI-compliant gateways. Webhook handlers verify the Stripe signature, eliminating fake notifications. Average payment confirmation latency is less than 2 seconds. We also implement logging of all events for auditing.

Standard PCI DSS compliance

Transaction Tracking

CREATE TABLE transactions ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID REFERENCES users(id), course_id UUID REFERENCES courses(id), provider VARCHAR(50), -- 'stripe', 'yookassa', 'paypal' provider_payment_id VARCHAR(200) UNIQUE, amount NUMERIC(10,2), currency VARCHAR(3), status VARCHAR(50), -- 'pending', 'succeeded', 'failed', 'refunded' coupon_code VARCHAR(100), discount_amount NUMERIC(10,2) DEFAULT 0, created_at TIMESTAMPTZ DEFAULT NOW() ); 

What's Included in the Integration

• Audit of the current LMS and selection of the optimal gateway.
• Design of the payment scheme (one-time, subscriptions, installment).
• Implementation of Checkout sessions and webhook handlers covering all edge cases.
• Integration of promo codes and corporate licenses.
• Creation of a transaction table and connection to users.
• Load testing: verification of up to 1000 payments per minute.
• Developer documentation (diagrams, configs, code examples).
• Team training: a 2-hour workshop on payment management.
• 2 weeks of technical support after going live.

How Does the Integration Process Work?

1. Audit of current LMS and gateway selection (1 day).
2. Design of payment scheme (1–2 days).
3. Implementation of Checkout sessions and webhook handlers (2–3 days).
4. Integration of promo codes and corporate licenses (1–2 days).
5. Creation of transaction table and user connections (1 day).
6. Documentation and training (1 day).
7. Deployment and final testing (1 day).

Get a consultation on integrating your LMS. We will assess the current architecture and propose the optimal solution within 1 day. Contact us to discuss your project.

We guarantee stable operation of the payment integration: all webhook scenarios are covered by tests, and monitoring alerts on errors. Experience from 40+ projects confirms: our solutions withstand peak loads of up to 1000 payments per minute.