Should you hire a corporate event planner, or run the event in-house? This is one of the most common questions I get, and there's no universal answer. The right call depends on your event size, complexity, internal capacity, and what's at stake if things don't go well.

Here's a framework to make the decision clearly.

Start with these five questions

Before you decide, answer these honestly:

1. How many guests? Under 50, in-house is usually fine. Over 100, the workload starts to outstrip what a non-specialist can handle part-time. Over 200, you almost certainly need a planner.
2. How many vendors? One or two (a venue and a caterer), in-house is manageable. Five or more (venue, catering, AV, decor, entertainment, photography, transportation), you need someone whose full-time job is coordinating them.
3. Multi-city or single-city? Anything involving travel coordination, hotel blocks, or out-of-town logistics adds an order of magnitude of complexity.
4. Who's running it internally? A trained event coordinator with bandwidth is fine. An office manager doing this on top of their actual job, less fine.
5. What's at stake? A casual department happy hour: in-house. An event with the CEO, board, or major clients present: don't gamble.

A simple decision matrix

Add up your answers:

• Mostly low-complexity (under 50 guests, 1-2 vendors, single city, dedicated coordinator, low stakes): DIY is appropriate.
• A mix (50-150 guests, 3-4 vendors, single city, part-time coordinator, moderate stakes): Consider partial planning or day-of coordination.
• Mostly high-complexity (150+ guests, 5+ vendors, multi-city, no dedicated coordinator, high stakes): Hire a full-service planner.

The middle case is where most companies get it wrong. They try to DIY a 100-person event with five vendors and an internal coordinator who has another job. It's the gap where things break.

When DIY actually works

In-house event planning is the right call when:

- You have a true internal event coordinator with real experience and current bandwidth

- The event format is repeatable (you've run the same holiday party at the same venue for five years)

- The event is internal-only, low-stakes, and forgiving of small mistakes

- The budget is small enough that vendor savings from a planner wouldn't cover the planning fee

In those cases, you'll get the same outcome from your team that you'd get from a planner. Save the money.

When DIY almost always fails

DIY tends to break in predictable ways:

• Vendor management. When you don't run events full-time, you don't have the leverage. You take the first quote, miss the negotiation window, and miss the small print.
• Contract review. F&B attrition clauses, AV minimums, and cancellation terms are dense. A planner reads them weekly. Your team probably reads them once a year.
• Onsite execution. When the timeline slips at 7:15 PM, who's fixing it? If your team is hosting *and* coordinating, both jobs suffer.
• Photography and content capture. Almost always missed or under-resourced internally. Then you don't have content for next year's recruiting page.
• Post-event reconciliation. Internal teams almost never do a real budget review. Mistakes recur.

If three or more of these resonate from past events, that's your signal.

The middle option most companies don't know about

You don't have to choose between full-service planning and full DIY. There's a middle path: partial planning or month-of coordination.

• Partial planning. You handle vendor selection and contracts; a planner handles project management, logistics, and onsite execution. Typical fee: 40 to 60 percent of full-service.
• Month-of coordination. You plan the event entirely; a planner takes over four to six weeks out for final coordination, vendor confirmation, and onsite execution. Typical fee: 20 to 30 percent of full-service.

Both are great options for companies with internal capacity that runs out at the finish line, which is most companies.

A quick gut-check

Here's the simplest test: imagine your event happens tomorrow as currently planned. How confident are you, on a scale of 1 to 10, that it will run smoothly?

• 9 or 10: DIY is fine. You've got it.
• 6 to 8: Bring in a planner for partial or month-of support.
• 5 or below: Bring in a full-service planner. The risk is bigger than the fee.

That gut number is usually right.

The honest bottom line

Most companies need a planner more often than they think, but less often than the industry would have them believe. A 30-person internal happy hour doesn't need a planner. A 175-person holiday party with photography and a CEO speech does. Match the engagement to the actual complexity, not to the assumption.

If you're sizing up an upcoming event and want help figuring out whether you need full-service, partial, or just a sanity check, [I'm happy to walk through it with you](https://thegranddetail.com). Even if the answer is "you've got this," I'll tell you straight.