7 Obvious Mistakes Every Event Planner Makes At Least Once

Every event planner makes a few classic mistakes at least once — emailing the wrong contact, blowing the budget, under-communicating, under-staffing, misjudging catering or transportation, and yes, wearing the wrong shoes. The good news is that every one of them is avoidable once you know to watch for it. Consider this your friendly heads-up from people who’ve seen it all, so you can skip the hard-won lessons and run a smoother event.

1. You email the wrong person

It sounds small, but sending key details to the wrong contact — or burying the right person in a giant thread — is where timelines quietly fall apart. Vendors miss deadlines, speakers don’t get what they need, and you’re left chasing. Confirm exactly who owns each piece early, keep a simple contact sheet, and make sure every important message reaches a real decision-maker, not an inbox nobody checks.

2. You go over budget

Budgets rarely blow up on the big line items — it’s the steady drip of “small” add-ons that gets you: the extra A/V, the upgraded linens, the last-minute headcount. Build a realistic budget with a genuine contingency (10–15% is a good rule) and track spending against it as you go. Knowing your number cold lets you say yes to what matters and no to what doesn’t, without a nasty surprise at the end.

3. You order the wrong amount of food

Too little food and your guests remember being hungry; too much and you’ve wasted budget you could have spent elsewhere. Confirm your headcount as close to the event as your caterer allows, account for dietary needs, and ask your venue or caterer what they’d recommend for your specific format — a seated dinner and a networking reception need very different quantities.

4. You under-communicate

Most event-day chaos traces back to someone not knowing something they should have. Your team, your vendors, your venue, and your speakers all need the run-of-show, their responsibilities, and a point of contact. Over-communicating in the days before an event feels like overkill right up until the moment it saves you — so send the schedule, confirm the details, and make sure everyone knows who to call when something changes.

5. You assume transportation is a guarantee

Flights get delayed, rideshares surge, and parking fills up. Don’t leave your speaker’s or VIPs’ arrival to chance. Arrange reliable transportation, build in buffer time, and have a backup plan for the person whose absence would derail your agenda. A speaker stuck in traffic five minutes before their keynote is a stress you can prevent with a little foresight.

6. You under-staff your event

Trying to run everything with too few hands is a fast track to a frazzled team and a bumpy guest experience. Map out every role the day actually requires — registration, A/V, speaker wrangling, troubleshooting — and staff for the busy moments, not the quiet ones. A little extra help during peak times keeps small problems small.

7. You wear the wrong shoes

It’s the one every veteran planner laughs about — because they learned it the hard way. You will be on your feet for hours, crossing the venue a hundred times. Wear shoes you can move in. Take care of yourself on event day (comfortable shoes, water, a real meal), because a planner running on empty makes more of the mistakes above, not fewer.

The takeaway

None of these mistakes are fatal, and all of them are avoidable with a little planning and communication. Give yourself the buffer, the backups, and the comfortable shoes — and your event will run smoother for it.

One thing you never have to worry about getting wrong: the speaker. At Platinum Speakers Agency, we handle the vetting, the booking, and the logistics of your keynote so that’s one major piece you can check off with confidence. Meet our speakers or get in touch to make your next event a smooth one.