Passkit

PassKit

Accept Apple Pay payments for physical goods, real-world services, donations, and eligible recurring payments, and add passes to the user's Wallet. Covers payment buttons, payment requests, authorization, Wallet passes, and merchant configuration. Targets Swift 6.3 / iOS 26+.

For advanced Apple Pay flows, one PKPaymentRequest can set only one optional advanced request type: recurring, automatic reload, deferred, Apple Pay Later availability, or multi-token contexts. Use separate payment requests when a checkout needs more than one of those modes.

Contents

• Setup
• Displaying the Apple Pay Button
• Creating a Payment Request
• Presenting the Payment Sheet
• Handling Payment Authorization
• Wallet Passes
• Checking Pass Library
• Common Mistakes
• Review Checklist
• References

Setup

Project Configuration

1. Enable the Apple Pay capability in Xcode
2. Create a Merchant ID in the Apple Developer portal (format: merchant.com.example.app)
3. Generate and install a Payment Processing Certificate for your merchant ID
4. Add the merchant ID to your entitlements

Availability Check

Always verify the device can make payments before showing Apple Pay UI. If you check for an active card with canMakePayments(usingNetworks:capabilities:), Apple's HIG expects Apple Pay to be a primary, prominent payment option wherever you use that check.

import PassKit

func canMakePayments() -> Bool {
    // Check device supports Apple Pay at all
    guard PKPaymentAuthorizationController.canMakePayments() else {
        return false
    }
    // Check user has cards for the networks you support
    return PKPaymentAuthorizationController.canMakePayments(
        usingNetworks: [.visa, .masterCard, .amex, .discover],
        capabilities: .threeDSecure
    )
}

Displaying the Apple Pay Button

SwiftUI

Use the built-in PayWithApplePayButton view in SwiftUI. Use Apple-provided button APIs for any control labeled Apple Pay; custom buttons must not include the Apple Pay logo or "Apple Pay" text.

import SwiftUI
import PassKit

struct CheckoutView: View {
    var body: some View {
        PayWithApplePayButton(.buy) {
            startPayment()
        }
        .payWithApplePayButtonStyle(.black)
        .frame(height: 48)
        .padding()
    }
}

UIKit

Use PKPaymentButton for UIKit-based interfaces.

let button = PKPaymentButton(
    paymentButtonType: .buy,
    paymentButtonStyle: .black
)
button.cornerRadius = 12
button.addTarget(self, action: #selector(startPayment), for: .touchUpInside)

Button types: .plain, .buy, .setUp, .inStore, .donate, .checkout, .continue, .book, .subscribe, .reload, .addMoney, .topUp, .order, .rent, .support, .contribute, .tip

Creating a Payment Request

Build a PKPaymentRequest with your merchant details and the items being purchased. PassKit amount APIs take NSDecimalNumber, not Double.

func createPaymentRequest() -> PKPaymentRequest {
    let request = PKPaymentRequest()
    request.merchantIdentifier = "merchant.com.example.app"
    request.countryCode = "US"
    request.currencyCode = "USD"
    request.supportedNetworks = [.visa, .masterCard, .amex, .discover]
    request.merchantCapabilities = .threeDSecure

    request.paymentSummaryItems = [
        PKPaymentSummaryItem(
            label: "Widget",
            amount: NSDecimalNumber(string: "9.99")
        ),
        PKPaymentSummaryItem(
            label: "Shipping",
            amount: NSDecimalNumber(string: "4.99")
        ),
        PKPaymentSummaryItem(
            label: "My Store",
            amount: NSDecimalNumber(string: "14.98")
        ) // Total
    ]

    return request
}

The last item in paymentSummaryItems is treated as the total and its label appears in the Pay line on the payment sheet.

Requesting Shipping and Contact Info

Request only the contact fields needed to price, fulfill, or legally process the order. Collect required product choices, optional notes, per-item shipping destinations, and pickup locations before the Apple Pay button when the payment sheet cannot collect them accurately.

request.requiredShippingContactFields = [.postalAddress, .emailAddress, .name]
request.requiredBillingContactFields = [.postalAddress]

let standard = PKShippingMethod(
    label: "Standard",
    amount: NSDecimalNumber(string: "4.99")
)
standard.identifier = "standard"
standard.detail = "5-7 business days"

let express = PKShippingMethod(
    label: "Express",
    amount: NSDecimalNumber(string: "9.99")
)
express.identifier = "express"
express.detail = "1-2 business days"

request.shippingMethods = [standard, express]

request.shippingType = .shipping // .delivery, .storePickup, .servicePickup

Supported Networks

Query available networks at runtime with PKPaymentRequest.availableNetworks().

Presenting the Payment Sheet

Use PKPaymentAuthorizationController (works in both SwiftUI and UIKit, no view controller needed). The controller's delegate is weak, so retain the controller for the life of the sheet.

final class CheckoutCoordinator: NSObject {
    private var paymentController: PKPaymentAuthorizationController?

    @MainActor
    func startPayment() {
        let controller = PKPaymentAuthorizationController(
            paymentRequest: createPaymentRequest()
        )
        paymentController = controller
        controller.delegate = self
        controller.present { [weak self] presented in
            if !presented {
                self?.paymentController = nil
            }
        }
    }
}

Handling Payment Authorization

Implement PKPaymentAuthorizationControllerDelegate to process the payment token.

extension CheckoutCoordinator: PKPaymentAuthorizationControllerDelegate {
    func paymentAuthorizationController(
        _ controller: PKPaymentAuthorizationController,
        didAuthorizePayment payment: PKPayment,
        handler completion: @escaping (PKPaymentAuthorizationResult) -> Void
    ) {
        // Send payment.token.paymentData to your payment processor
        Task {
            do {
                try await paymentService.process(payment.token)
                completion(PKPaymentAuthorizationResult(status: .success, errors: nil))
            } catch {
                completion(PKPaymentAuthorizationResult(status: .failure, errors: [error]))
            }
        }
    }

    func paymentAuthorizationControllerDidFinish(
        _ controller: PKPaymentAuthorizationController
    ) {
        controller.dismiss { [weak self] in
            self?.paymentController = nil
        }
    }
}

Handling Shipping Changes

func paymentAuthorizationController(
    _ controller: PKPaymentAuthorizationController,
    didSelectShippingMethod shippingMethod: PKShippingMethod,
    handler completion: @escaping (PKPaymentRequestShippingMethodUpdate) -> Void
) {
    let updatedItems = recalculateItems(with: shippingMethod)
    let update = PKPaymentRequestShippingMethodUpdate(paymentSummaryItems: updatedItems)
    completion(update)
}

Wallet Passes

Adding a Pass to Wallet

Load signed .pkpass data, verify the device can add passes, then present PKAddPassesViewController when you want the user to review the pass before adding it. PKPass(data:) expects signed pass data and can throw invalid-data