Event budget and timeline: how to calculate and plan it step by step

Two things explain most event problems: a budget that runs short halfway through and tasks left until the end. Both are avoided the same way: plan early, in writing and with a margin.

This guide covers how to calculate an event budget, which cost lines you cannot leave out, how much margin to keep, a timeline from six months out to event week and how to coordinate suppliers without losing control.

The essentials in 30 seconds

• Separate fixed and per-person costs: the venue or technical kit cost the same for 80 or 120 guests; the menu and drinks do not.
• Keep 10 to 15% for contingencies.
• Ask for every quote itemised and including VAT, so you can compare them.
• Start early: three to six months for a mid-sized event; more in December or spring.
• One contact for venue, catering and technical kit makes everything simpler.

The cost lines of an event budget

• Venue: hire, hours included, set-up and take-down.
• Catering: menu or cocktail per person, options for allergies and diets.
• Drinks: included in the menu, per drink or open bar by the hour.
• Technical kit: sound, microphones, screens, lighting, streaming.
• Staff: waiters, technicians, hosts, security, coordination.
• Production and decoration: stage, furniture, flowers, branding, photocall.
• Entertainment: DJ, live music, performers, activities.
• Communication: invitations, accreditation, photography and video.
• Logistics: guest transport, accommodation, parking.
• Contingency: 10 to 15% of the total.

How to calculate the budget step by step

1. Set the number of attendees within a realistic range: minimum and maximum.
2. Separate fixed costs (venue, technical kit, production, entertainment) from per-person costs (menu, drinks, gifts).
3. Work out the total: fixed costs + cost per person × attendees.
4. Add VAT to each line if the quotes do not include it.
5. Add the contingency margin, 10 to 15%.
6. Divide the total by the number of attendees to see the real cost per person and compare it with what you planned.

A tip: calculate the budget with both the minimum and the maximum number of attendees. That shows how much the cost changes if more or fewer people confirm.

How to trim the budget without it showing

• Choose a weekday or a lunch instead of a dinner.
• A set menu instead of ordering from the menu.
• A venue with in-house catering and technical kit: you avoid paying for transport, set-ups and coordinating several suppliers.
• Everything in one building: cocktail, dinner and party with no transfers or coaches.
• Spend where it shows: food, sound and lighting. Cut back on what nobody will remember.

Event planning timeline

• Six months or more ahead: goal, budget, date and venue. For large events or December, the earlier the better.
• Three to five months: catering, technical kit, entertainment and main suppliers. Venue visit.
• Two to three months: invitations, programme or run of show, design and decoration.
• One month before: confirmations, final menu, allergies, transport and accommodation.
• Two weeks before: final guest numbers, timings with all suppliers and plan B.
• Event week: coordination meeting, final lists and technical test.
• On the day: set-up, rehearsal, supplier arrivals and a person in charge of each area.
• Afterwards: payments, thank-yous, photos and a guest survey.

How to coordinate suppliers

• Written contracts stating what each service includes, timings and payment and cancellation terms.
• A shared timings document for everyone: arrival, set-up, start, changes of setting and take-down.
• One contact per supplier on the day, with their phone number on a list.
• Cross-check technical needs: the DJ, the sound technician and the venue should talk before the event.
• Public liability insurance for outside suppliers, if the venue requires it.
• A single coordinator: the fewer intermediaries, the less gets lost along the way.

Common mistakes

• No margin for contingencies.
• Comparing quotes that do not include the same things.
• Forgetting VAT or extra hours.
• Fixing guest numbers too late.
• Hiring too many suppliers with nobody coordinating them.

Budget and planning at Palau Alameda

At Palau Alameda, on Paseo de la Alameda, the venue, catering, technical kit, staff and production are quoted in a single itemised proposal, with one contact from the visit to the end. The process is simple: a personalised visit, a tailored proposal within 24 hours, pre-production coordinated with the team and delivery of the event through to take-down.

With 2,700 m² and three spaces that can be combined, Àtic, La Gran Sala and Azza, the cocktail, dinner and party can happen without transfers. You will find all the details on our private events page.

More guides for organising your event:

• How to choose a venue for an event.
• How to organise a product launch.
• How to organise a conference or convention.
• Christmas company dinners in Valencia.

Frequently asked questions

How do you calculate an event budget?

Add the fixed costs (venue, technical kit, production, entertainment) and the per-person costs (menu, drinks) multiplied by the number of attendees, then add VAT and a contingency margin of 10 to 15%.

Which cost lines should an event budget include?

Venue, catering, drinks, technical kit, staff, production and decoration, entertainment, communication, logistics and contingency.

How much contingency should you keep?

10 to 15% of the total budget. For large events or events with many suppliers, closer to 15% is safer.

How far ahead should you organise an event?

Three to six months for a mid-sized event and six months or more for a large one or on busy dates such as December. The first things to fix are the date and the venue.

How do you coordinate event suppliers?

With written contracts, a shared timings document, one contact per supplier on the day and one person coordinating them all. A venue with in-house catering and technical kit greatly reduces coordination.

How can you save on an event without it showing?

Choose a weekday or a lunch, a set menu, a venue with in-house catering and technical kit, and avoid moving between venues. And keep the budget for what shows most: food, sound and lighting.