An event site that sells seats,
not just announces the date
Ticket sales create the one traffic spike a site cannot fail during: the first minutes after announcement. We build capacity logic that holds under a real rush and payments that do not silently oversell a sold-out event. Check-in works at the door without a paper list.
Why the first minutes decide everything
An event website with ticket sales has to survive the single highest-traffic moment it will ever see: the first minutes after tickets go live. It cannot oversell a limited venue or lose a payment partway through checkout. That takes capacity logic that holds under genuine concurrent load, plus clear ticket tiers with correct pricing. It also takes a check-in flow that works at a real door with real connectivity, not just in a calm test environment.
It is the right project for a conference, festival, workshop series or any ticketed event where capacity is genuinely limited and the sale moment matters. It is the wrong project for a free, unlimited RSVP event, which needs far less infrastructure than this. We would say so honestly rather than overbuild.
What’s in the build
Capacity enforcement is the foundation. Checking for remaining tickets and reserving one happen as a single atomic step, tested specifically under simulated concurrent buyers. A simple counter that reads and writes separately is exactly what oversells a popular event in its first busy minute. Ticket tiers (early bird, general, VIP) carry correct pricing and timing rules on their own as each tier opens or closes. No manual intervention needed.
Payment processing includes automatic refund handling for cancellations or event changes. Processing refunds by hand for a canceled event at scale is its own operational nightmare. Each ticket generates a QR code or digital pass. The check-in view at the door is built to work even with unreliable venue connectivity. It caches the attendee list locally and syncs once a connection is available, so bad venue Wi-Fi does not turn into a line of frustrated attendees.
How the build runs
We start with expected attendance, ticket tiers, and anything that went wrong at past events, if there is history. The capacity and payment logic has to be sized and tested against realistic demand, not a guess. The capacity and reservation logic gets built and deliberately stress-tested first, simulating a rush of concurrent buyers. Only then does work start on the event page’s design and content.
Build proceeds in weekly sprints, with payment and refund flows tested early and thoroughly. Before launch we run a real load test on the ticket sale flow, and a real walkthrough of check-in at the actual venue if possible. The gap between a demo environment and a real door with a real Wi-Fi signal is where ticketing systems most often fail in practice.
Timeline and price
| Tier | Price | What it covers | Timeline |
|---|---|---|---|
| MVP | from $3,200 | Ticket sales, capacity logic, tiers, QR check-in | 4 to 5 weeks |
| Production | from $6,800 | Recurring event series, offline check-in, refund automation | 5 to 7 weeks |
| Full control, handover-ready | from $7,800 | Everything above, plus full documentation so an in-house team can launch new events independently | 5 to 7 weeks |
Running cost after launch is mostly payment processing fees. The capacity and check-in logic need little ongoing attention once proven under load.
What you own at the end
Payments run through your own provider account, and attendee and ticket data live in your own database from day one. Documentation covers the capacity logic, so another developer can safely maintain it. For a recurring event series especially, owning this outright means a future event’s ticketing is never dependent on one vendor’s continued goodwill or pricing.
Related
This pairs with membership site with paywall for recurring events with a subscription model. See booking web app for the same availability-under-load pattern applied to appointments. For the technical layer, see ticketing and events sales and payment gateway integration. For related work on marketplaces and invite-only access under real demand, see our own marketplace, ProBay, case and the private, invite-only Telegram Mini App case.
Have an event announcement coming and worried the ticket page will not survive the rush? Get in touch and we will look at what capacity planning actually needs.
FAQ
How much does an event ticketing site cost?
From $3,200 for ticket sales with capacity limits, multiple tiers and QR check-in, live in 4 to 7 weeks. A recurring event series or a platform selling tickets for multiple events runs $6,500 to $11,000.
How do you prevent overselling during a rush?
Capacity checks and ticket reservation happen as one atomic step at the database level. We test it deliberately under simulated concurrent buyers, not with a simple counter that gets read and written out of sync the moment many people buy at once.
Can check-in work without internet at the venue?
Yes. Where venue connectivity is unreliable, the check-in view works offline, with the attendee list cached locally and synced once connectivity returns. Slow venue Wi-Fi does not stop people getting in.
Who owns the ticketing system and attendee data?
You do. Payments run through your own payment provider account. Attendee and ticket data live in your own database, not a third-party ticketing platform that takes a cut of every sale.
What happens after the event?
30 days of fixes are included, covering the full lifecycle from sale through check-in. For a recurring event series, we usually move to a lighter ongoing arrangement for each new event launch.