Online booking system: let clients book appointments themselves

An online booking system is the part of your website where clients choose a service, a specialist and a free time slot themselves, leave their contact details and receive a confirmation straight away. Every booking lands in one calendar. There are three ways to set it up — use a ready-made online tool, install a WordPress plugin or have a custom system built.

Who needs online booking?

Online booking is useful for any business that sells time, a place or an item for a set period. Most often that means:

• clinics and healthcare practitioners — appointments with a specific doctor or specialist;
• beauty salons and hairdressers — services of different lengths and several stylists;
• car repair shops — work bays, lifts and mechanics’ time;
• training and event organisers — limited places, a registration deadline and a list of participants;
• rental businesses — campervans, motorbikes, equipment or premises, where the client picks dates.

In all of them, clients call just to find out when you are free. If many calls boil down to “is tomorrow at 2 pm OK?”, online booking saves time on both sides.

What should a good booking system do?

A good system shows clients only the slots that are genuinely free, and shows you every booking in one place with the tools to manage it. Below is a feature checklist you can use to assess any solution.

A few practical tips when choosing features:

• Start with the essentials. Calendar, confirmation and admin are the foundation; reminders and payments can be added later.
• Allow for buffers. If you need time to prepare between appointments, the system should add it automatically.
• SMS costs extra. Messages are sent through an SMS provider that charges for each message.
• Payments need a payment provider. In Lithuania, Paysera, Montonio or Stripe are the usual choices; their fees are published on the providers’ websites.

We can implement SMS reminders and syncing with staff calendars, but to be upfront: we do not yet have live projects with these features to show. Proven WordPress plugins are usually used for this, and if they do not fit, we programme the feature ourselves.

Ready-made tool, WordPress plugin or custom system?

The choice depends less on price than on how far your rules differ from the standard ones. If booking is simple, a ready-made tool or plugin will do; if the rules are complex or the system has to work with your other software, a custom build is worth it.

Vendors publish their prices on their own websites; compare the annual cost as your team and bookings grow, not just the starting price.

Our prices: a booking system for an existing website — from €599; a new website with a booking system — from €990. Prices are final — no VAT is added, we are not VAT-registered. The exact price depends on the number of services, the rules and any integrations.

What personal data can you collect, and how should you store it?

A booking form should collect only the data needed to provide the service. That is what the General Data Protection Regulation (GDPR) requires under the data minimisation principle (Article 5(1)(c)). For most services, a name and a phone number or email address are enough.

The main requirements to keep in mind:

1. Legal basis. Booking data is processed to enter into or perform a contract with the client (Article 6(1)(b)), so no separate consent is needed for that.
2. Separate consent for newsletters. If you want to send offers or news, ask for separate, explicit consent — the tick box must not be pre-ticked.
3. Transparency. Place a link to your privacy policy next to the form, stating who processes the data, who it is shared with and how long it is kept (Article 13).
4. Retention period. Data must not be kept longer than necessary (Article 5(1)(e)). Old bookings should be deleted or anonymised regularly — this can be automated.
5. Health data. Clinics need extra care: health information is a special category of data (Article 9). Avoid asking clients to describe symptoms or diagnoses on the booking form unless it is genuinely needed to schedule the visit.
6. Access and security. Only staff who need bookings for their work should see them; the site must run over HTTPS and the admin panel must be password-protected.

If you use a ready-made tool, the vendor becomes your data processor — you need a data processing agreement with them (Article 28), and you should know which country your data is stored in. In Lithuania, GDPR is supervised by the State Data Protection Inspectorate (VDAI), which publishes guidance for businesses on its website.

How to roll out online booking: step by step

Rollout starts not with choosing software but with writing down your rules. The more precisely you define them, the fewer surprises there will be after launch.

1. List your services. For each one: length, price, who provides it and whether a break is needed afterwards.
2. Set schedules. Opening hours, staff rotas, days off and how far ahead clients can book.
3. Define the rules. How late clients can cancel or reschedule, whether a deposit is required and what happens after a no-show.
4. Choose a solution. Use the table in the previous section — ready-made tool, plugin or custom system.
5. Prepare the email texts. Confirmation, reminder and cancellation — with your address, contact details and a cancellation link.
6. Update your privacy policy. State what data is collected through booking and how long it is kept.
7. Test it. Make bookings yourself from several phones and a computer; check the emails, cancellation and payment.
8. Launch and tell your clients. Put a booking button at the top of your website, in your email signature and on your social media profiles.

In the first weeks, watch where clients get stuck: abandoned bookings usually mean an overlong form or an unclear time picker.

Our experience: course registration for gerimokymai.lt

We built online registration for the training website gerimokymai.lt, a WordPress site that lists courses and conferences for healthcare and pharmacy professionals. Participants have to register in advance, and registration closes at a set deadline.

The registration form guides participants step by step: they choose a course, a date and a time and enter their details, and each time slot shows how many places are left. When places run out, the form says so, so the organiser does not have to check the participant list by hand.

We have also built booking features for the rental websites su-kemperiu.lt and rentmotoadventure.com, where clients choose their rental dates.

How can we help?

The Saitai.lt team helps you define your booking rules, chooses the right solution and puts it in place: we configure a WordPress plugin or build a custom system, connect payments and prepare the email texts. If you want to see bookings alongside each client’s history, it is worth reading what a CRM system is.

• Online booking and registration systems — features, process and price.
• WordPress development — if your site already runs on WordPress.
• Web programming — when you need a non-standard solution.