B2B Travel Portal: How Sub-Agent Booking Works
By Travel White Label · Published 15 October 2026 · Updated 15 October 2026
A B2B travel portal is the system consolidators and travel operators use to let sub-agents search, book and manage travel under your rates, credit and rules — not a consumer holiday website. Credit limits, markups and agent logins decide who can sell, at what price, and how much risk you take.
This guide covers the booking flow, a worked credit-and-markup example (illustration only), roles, reporting and a checklist before you onboard sub-agents.
In this guide
What a B2B travel portal is (vs B2C)
How sub-agent booking works
Credit limits and risk control
Markups: fixed vs percentage; net vs sell
Agent logins, roles and permissions
Reporting and settlements
Checklist before onboarding sub-agents
Key takeaways and FAQs
What a B2B travel portal is (vs B2C)
A B2C travel site sells to the traveller: public prices, card checkout, holiday marketing. A B2B travel portal sells through the trade: sub-agents log in, see your net or sell rates (as you configure them), book against credit or a prepaid balance, and settle with you under agreed terms.
Typical users include:
Consolidators who wholesale flights, hotels and packages to independent agents
Tour operators who open inventory to partner agencies
Host agencies and networks that need one login stack for many small agencies
A branded consumer site is a separate track — see the white label travel website UK guide. TravelWhiteLabel’s B2B platform is built for the trade side: agent accounts, credit and markups. Also see the B2B travel agent portal.
How sub-agent booking works
Three parties sit in every B2B booking:
You (consolidator / portal owner) — supplier connectivity, credit, markups and agent settlements.
The sub-agent — logs into your portal and books for their client.
The traveller — usually never sees your B2B login; they deal with the sub-agent.
Typical flow:
You create an agent account with role, credit limit and markup rules.
The sub-agent logs in and searches flights, hotels or packages from your connected suppliers.
The portal applies your markup and shows the sell price (or net, if you expose nets).
The agent confirms against available credit or prepaid balance.
Documents go to the agent; the booking appears on your consolidator reports.
Settlement follows your terms — invoice, balance reduction, or card where you allow it.
Our suppliers are ATOL and ABTA protected. TravelWhiteLabel does not hold an ATOL. Supplier content is included at no extra cost on every plan; your own GDS or payment gateway charges, if you add them, are billed by those providers.
Credit limits: how they control risk
Credit limits stop a sub-agent booking more than you are willing to fund between settlements. Without a limit, one busy week — or one bad debt — can leave you exposed to suppliers while you chase the agent.
Common patterns:
Hard limit — booking stops at the ceiling
Soft warning — alert at around 80% used, then a hard stop
Per-product rules — tighter caps on high-ticket products
Temporary top-ups — raise for a known peak, then reset
Worked example (illustration only — not real client data)
You onboard “Northbridge Travel” with a £5,000 credit limit.
StepDetailCredit usedCredit leftOpeningLimit £5,000, used £0£0£5,000Booking AFlight + hotel, net £800, sell after markup £896£896£4,104Booking BHotel only, net £420, sell £470£1,366£3,634SettlementAgent pays £1,366 on invoice day£0£5,000 restored
In this illustration the portal treats the sell amount (what the agent owes you) as credit usage. Some consolidators debit net and take markup as a separate line — either model works if the agency agreement and portal match.
If Booking C needs £3,700 while only £3,634 remains, a hard limit blocks it until the agent settles or you raise the limit. That single rule often matters more than any marketing feature on a B2B portal.
Markups: fixed vs percentage; who sees net vs sell
Markup turns supplier net into the price your sub-agent sells — or the price they pay you.
Percentage markup — e.g. 10% on net. Scales with ticket size; simple to explain.
Fixed markup — e.g. £25 per booking or passenger. Predictable on low-value tickets; can look thin on expensive packages.
Many portals allow rules by product, agent tier or destination. Keep the set small enough to explain on a sales call.
Who sees net vs sell?
ViewWhat the sub-agent seesTypical useSell onlyFinal price to quote the travellerProtects your net; common for new agentsNet + sellBoth figures and the marginTrusted partnersNet onlyCost price; agent adds their own retailHost-agency style where the sub-agent owns retail margin
Using the illustration above: net £800 with a 12% markup → sell £896. Consolidator margin is £96 before any separate agent commission split.
Be explicit in contracts: can the agent discount below your sell floor? Can they add their own fee? The portal should enforce the floor even when the contract already says it.
Agent logins, roles and permissions
One shared password for a whole agency is how bookings go wrong. A proper B2B travel portal uses named logins with roles:
Owner / admin — manage users, see all bookings and credit
Booker — search and book within credit
Finance — invoices and settlements; may not book
Read-only — training or compliance review
Hygiene that pays for itself:
One person, one login — no shared credentials
Disable leavers the same day
Keep test accounts off live credit
Log who confirmed each booking
Match permissions to the agency agreement
If you also run a consumer site, keep B2B logins off the public website. Sub-agents should enter through a dedicated agent URL or your B2B platform path.
Reporting and settlements (high level)
A usable portal already shows bookings by agent and product, credit used vs limit, markup vs net, cancellations and outstanding balances.
Settlements are the cash rhythm: weekly or fortnightly invoices, direct debit, or prepaid top-ups. Align credit reset with how you actually collect money. If invoices go out on Friday but credit only refreshes when cash clears, say so in the agent terms.
For UK package and protection wording on flight-inclusive products, read ATOL vs ABTA. Protection sits with the principal and the product — not with “having a portal”.
Checklist before onboarding sub-agents
Agency agreement — credit, markup, cancellations, data protection, whose name is on the customer contract.
Credit policy — opening limit, review triggers, hard vs soft stop, who can raise limits.
Markup matrix — percentage vs fixed by product; sell floor; whether nets are visible.
Roles — admin, booker, finance; no shared passwords.
Supplier & protection map — our suppliers are ATOL and ABTA protected; TravelWhiteLabel does not hold an ATOL.
Settlement calendar — invoice frequency, payment method, credit behaviour on payment.
Training — short booking walkthrough and “what to tell the traveller” script.
Support path — who the agent contacts when a booking fails or a name change is needed.
Test booking — one low-value live or sandbox booking before the whole desk goes live.
Exit process — freeze credit and export booking history if the relationship ends.
Key takeaways
A B2B travel portal is for trade bookings under your credit and markup rules — not a public B2C shop.
Sub-agent booking flows consolidator → agent login → traveller service by the agent.
Credit limits cap risk between settlements; hard stops beat hope.
Markups (fixed or %) turn net into sell; decide who sees net vs sell and enforce a floor.
Named logins and roles beat shared passwords.
Reporting and settlement must match how cash moves.
On TravelWhiteLabel, our suppliers are ATOL and ABTA protected; we do not hold an ATOL. No setup fee; free beta site; billing starts at go-live.
FAQ
What is a B2B travel portal?
A login-based booking system for travel agents and partners. They search and book your inventory under credit limits and markup rules you control, instead of emailing or using a consumer website.
How do credit limits work for sub-agents?
You set a maximum outstanding balance per agency (or user). Each booking uses credit until settlement. A hard limit blocks further bookings at the ceiling — as in the £5,000 illustration above.
Should I show net rates to every sub-agent?
Not always. Many consolidators show sell prices only to new agents and open net+sell to trusted partners. Put the choice in the agency agreement and mirror it in portal permissions.
Does using a white label B2B portal give me ATOL?
No. TravelWhiteLabel does not hold an ATOL. Our suppliers are ATOL and ABTA protected. Whether you need your own licence depends on how you trade — see ATOL vs ABTA and how to start an online travel agency in the UK.
What does TravelWhiteLabel cost for B2B?
There is no setup fee. Plans are Growth £179, Scale £599 and Elite £999 per month, with API access at £999 per month. Start on a free beta site; billing starts at go-live. Pay 12 months upfront and get 2 months free. Suppliers are included at no extra cost; your own GDS or payment gateway charges are not included.
Ready to run sub-agent booking with clear credit and markups?
Want a branded B2B travel portal without building the credit, markup and login stack from scratch? Start on a free beta site with TravelWhiteLabel. See the B2B platform, pricing, the B2B travel agent portal, or book a live demo.