Automating hotel and airline supplier payments: a step-by-step guide
If you've decided that automating supplier payments is the right move for your business, this guide walks through what implementation looks like from start to finish. We'll look at mapping your supplier base, configuring card controls, integrating with your booking system, testing, going live, and managing the programme once it is running. This article is written for operations and finance teams who will own the project, and it flags the friction points worth planning for up front rather than discovering mid-implementation. For a wider view of how virtual card automation works across different travel business types, see our article on automation in travel payments.
Implementing automated supplier payments is a defined project with a clear sequence. The steps below reflect what this journey looks like in practice, including the friction points that are worth planning for rather than discovering mid-implementation.
Before you start: what to have in place
Automation works best when the foundation is clear. Before starting, the business needs a defined list of suppliers to be included in the programme, clarity on which payment rails will be used for which supplier types, and a sponsor internally who owns the project through to go-live. Integration will require technical resource, whether internal developers or a provider implementation team. Finance needs to be involved from the start because the reconciliation output is the biggest operational change they will experience.
If you are not yet certain that automation is the right move for your business, our readiness guide is the right place to start. If you need to build a business case first, we have a framework for quantifying the cost of manual payments and projecting the value of automation.
Step 1: Map your supplier base
Start with a complete view of who you pay, how often, in what currency, and by what method. This is the supplier map, and it is the foundation for everything that follows.
For hotel payments, group suppliers by booking frequency, transaction value, and currency. The highest-volume, most consistent relationships are the best candidates for the first wave of automation. For airlines, the payment structure and settlement flow varies depending on the booking channel: GDS/BSP (Global Distribution System/Billing and Settlement Plan), NDC (New Distribution Capability), or aggregator. Ticketing and settlement work differently from hotel invoicing, so these may need separate consideration.
The supplier map also reveals where bank transfer will remain the right method. Some suppliers will not accept virtual cards, either by preference or by the nature of the transaction. These should be identified early and routed to bank transfer rather than treated as blockers to the programme.
Step 2: Configure your card controls
Card configuration determines how each virtual card behaves: the spending limit, the merchant restrictions, the expiry window, and the data fields returned in the reconciliation feed.
For hotel payments, the spending limit is typically set to the invoiced accommodation amount. Merchant restrictions scope the card to the relevant merchant category. The expiry window covers the check-in to check-out period plus a buffer for late charges. For airline payments, the configuration differs because ticket prices and ancillary charges need separate treatment.
The reconciliation data fields are worth specifying carefully. The more structured data returned per transaction (booking reference, supplier code, passenger name, travel dates) the more automated the matching process can be and the less manual intervention required at month-end.
Step 3: Integration, connecting your systems
Integration connects the booking or reservation system to the payment platform. When a booking is confirmed, the integration sends the booking data to the platform and triggers card issuance. When a card is charged by the supplier, the platform receives the settlement data and routes it back to the finance system.
API integration is the standard approach and gives the most control over data fields, card configuration, and reconciliation output. The provider should supply API documentation and a sandbox environment for development and testing. For businesses without in-house API development capability, portal-based options allow manual card creation. But these do not scale as cleanly for high-volume programmes.
The integration phase is where legacy system constraints are most likely to surface. Booking systems that were not designed with payment integration in mind may require middleware or workarounds. Flag these early in the scoping phase rather than discovering them during development.
Step 4: Test before you go live
Testing should cover the full payment flow: card issuance triggered by a test booking, the card being charged by a test supplier, reconciliation data received by the finance system, and the matching of settlement data against the booking record.
The reconciliation validation is the most important test. The output of the automated process needs to match what the finance team would have produced manually, down to the currency, the amount, and the booking reference. Variances in testing should be investigated and resolved before go-live. They will not resolve themselves in production.
If the provider offers a sandbox environment (and they should) use it properly. Run through the full scenario, including edge cases: a booking that is amended after card issuance, a no-show where the card is not charged, a charge that exceeds the card limit.
Step 5: Transition and go-live
Go-live is not a single moment. It is a transition period. The recommended approach is to run the automated process in parallel with the existing manual process for the first few weeks, cross-validating the outputs before switching off manual processing entirely.
During the parallel period, the finance team should check that every automated payment in the new system has a matching record in the old process, and that the reconciliation data aligns. This validation period builds confidence in the automated output and surfaces any issues while there is still a manual safety net.
Supplier communication matters during transition. Suppliers that are moving from a bank transfer relationship to virtual card settlement need notice and a clear contact for any questions. Suppliers that have not dealt with virtual cards before may need their accounts receivable team to understand how to process the payment.
Step 6: Ongoing management and adding suppliers
Once the programme is live, the ongoing management task is to maintain the supplier base, monitor reconciliation output quality, and expand coverage over time. Expanding coverage (adding suppliers that are currently being paid by bank transfer to the virtual card programme) is the primary lever for growing interchange income from the programme.
Regular reconciliation reviews identify whether the automated matching is working as expected or whether rule changes are needed. Card configuration may need updating when supplier pricing structures change. New suppliers can be onboarded to the programme using the same configuration and testing process used for the initial go-live.
Common friction points and how to handle them
Supplier resistance to virtual cards: the most common objection from hotel suppliers is that virtual card processing involves additional steps on their accounts receivable side. Working with a provider that actively engages with suppliers (explaining the process and supporting the acceptance setup) removes most of this friction without requiring the intermediary to manage it directly.
Legacy system integration: booking systems that pre-date API-first architecture may not have clean integration points. The solution is usually middleware or a staged approach: starting with a subset of bookings that can be integrated cleanly and expanding over time.
Find out what implementing virtual card supplier payments with Modulr looks like for your business.
This article is for informational purposes only and should not be construed as financial, legal, or regulatory advice.
TL;DR
Automating hotel and airline supplier payments follows a six-step sequence: supplier mapping, card configuration, integration, testing, parallel go-live, and ongoing management. Airline payments need separate consideration from hotels because settlement varies by booking channel (GDS/BSP, NDC, or aggregator). The most common friction points are supplier resistance to virtual cards, legacy system integration constraints, and internal sign-off processes. Each is manageable with preparation and the right provider support.
Frequently asked questions
What is the first step in automating hotel and airline supplier payments?
The first step is mapping your supplier base: identifying which hotels and airlines you pay, how frequently, in what currencies, and by what method currently. Group airlines separately because settlement varies by booking channel (GDS/BSP, NDC, or aggregator). This baseline tells you the scope of the automation project and helps you prioritise which suppliers to onboard first: typically starting with the highest volume and most consistent payment relationships.
How long does supplier payment automation take to implement?
Implementation timelines depend on integration complexity and the size of the supplier base. Businesses with an API-capable technical team and a clean supplier list can reach go-live in weeks. Those starting from a heavily manual baseline with legacy system constraints will take longer. Your provider should give a realistic timeline estimate during the scoping phase.
What should we test before going live with automated supplier payments?
Testing should cover the full payment flow end to end: card issuance triggered by a booking event, card charge by a test supplier, reconciliation data received and matched against the booking record, and variance handling when amounts differ. Most providers offer a sandbox environment for this. Do not go live without validating the reconciliation output matches your back-office data.
What are the most common friction points in supplier payment automation?
Three friction points come up most often: supplier resistance to accepting virtual cards, legacy system integration constraints where the booking system is not easily API-connected, and internal sign-off processes that slow down the configuration and go-live phases. Each is manageable with preparation. But plan for them rather than assuming a smooth path.
How do we handle suppliers that will not accept virtual cards?
Some suppliers prefer or require direct bank transfer. The right approach is not to force virtual card acceptance but to identify which suppliers are genuinely unsuitable for virtual card settlement and route those to bank transfer (SEPA Instant or Faster Payments) from the same platform connection. Over time, working with a provider that actively engages with suppliers on acceptance can shift the balance.
