Why Do Consultants Get Paid So Much? (Former McKinsey Guy Explains)

I'll never forget the look on my mate's face when I told him my day rate. "£1,800? For what, exactly? Telling people what to do?"

Fair question, honestly. I used to wonder the same thing before I got into this game. Spent three years at McKinsey, then five more running my own shop. Now I get it. And it's not what you think.

The Short Answer

Consultants get paid a lot because they deliver outcomes that are worth multiples of their fees. A consultant charging £150k for a three-month project better deliver at least £500k in value - or they won't get hired again.

But there's more to it. Let me break down the seven real reasons companies happily pay consultant rates that would make most employees' eyes water.

1. You're Not Paying for Time, You're Buying Speed

Here's something most people miss: consultants cost more per hour but deliver faster results. Way faster.

Your internal team is juggling their day job plus this new initiative. They'll get there eventually - maybe in 12 months. A consultant focuses 100% on that one thing and delivers in three months. Same outcome, four times faster.

Do the math: Would you rather pay £50k/year for someone to maybe finish something in 12 months, or £120k for guaranteed completion in 3 months? In business, time is literally money. Nine months of competitive advantage is often worth millions.

2. The "Been There, Done That" Premium

Your company is doing this thing for the first time. The consultant has done it 47 times. They know exactly what works, what doesn't, and which shortcuts save six months of trial and error.

Last year, I helped a manufacturing client implement a new ERP system. They budgeted 18 months. We did it in 9 because I'd seen every possible screwup in my previous 12 ERP implementations. That knowledge didn't come from a textbook - it came from expensive mistakes made on someone else's dime.

3. Consultants Can Say Things Employees Can't

This one's uncomfortable but real. Sometimes the CEO needs someone to tell them their strategy is rubbish. Employees can't do that without risking their careers. Consultants can - and do.

I once told a board that their acquisition target was overvalued by £15M. Their CFO had been saying the same thing for months but got shut down. When I said it (backed by analysis they paid £80k for), they listened. The acquisition was restructured, saving £12M.

Why? Because I was an expensive, independent voice with no political agenda. That objectivity costs money.

4. You're Buying Specialized Expertise, Not General Knowledge

Your marketing manager is good at marketing. A consultant who does nothing but fix underperforming marketing departments? They're exceptional at that one specific thing.

Think of it like medicine. Your GP can treat most things. But when you need brain surgery, you go to a neurosurgeon who charges 10x more. Same principle.

On Consultancy Register, the highest-paid consultants aren't generalists - they're specialists who've become the absolute best at solving one specific type of problem.

5. The Risk Transfer Factor

When you hire an employee, you're taking on risk. They might not work out. They might leave. They need training, benefits, management overhead.

A consultant? Fixed scope, fixed timeline, fixed cost. They don't work out? You stop the engagement. Project done? They leave. No HR headaches, no long-term commitment.

That flexibility has value. Companies pay premium rates because consultants bear the business risk that would otherwise sit with the company.

6. Consultants Work on the Business, Not in the Business

Your team is drowning in day-to-day operations. Who has time to step back and actually fix the underlying problems?

Consultants aren't putting out fires - they're redesigning the building so fires don't start. That strategic work is exponentially more valuable than tactical execution.

Example:

• • Your team handles customer complaints: £30k/year per person
• • A consultant redesigns your process to prevent complaints: £100k project fee
• • Result: Complaints drop 60%, saving £180k/year in support costs

Who delivered more value? The £100k consultant, every time.

7. The Network Effect

When you hire a good consultant, you're not just hiring one person. You're accessing their entire network.

Need a specialist for part of the project? They know someone. Need an intro to a potential client? They can make it. Need to know how competitors are solving this? They've probably worked with them.

My network has directly generated £2M+ in value for clients through introductions alone. That's separate from the actual consulting work.

But Here's the Catch...

Not every consultant is worth what they charge. Some are absolutely robbing clients blind with fancy slides and no substance.

Red flags that a consultant isn't worth their rate:

• • Can't show measurable results from past projects
• • Talks in vague platitudes instead of specific strategies
• • Wants open-ended engagement with no defined outcomes
• • Charges based on time rather than value delivered
• • Can't explain their methodology in plain English

The Real Question Isn't "Why So Expensive?"

It's "What's the ROI?" A consultant charging £200k better deliver £1M+ in value. If they can't articulate exactly how they'll do that, walk away.

The best consultants don't sell their time - they sell outcomes. "I'll save you £500k in operational costs" is worth paying £150k for. "I'll spend 6 months advising you" is not.

So Are They Worth It?

Depends. Are you hiring them for their expertise and results, or because you need someone to blame if things go wrong?

The former? Absolutely worth it. The latter? You're wasting money.

Good consultants aren't expensive. They're an investment that pays for itself many times over. Bad consultants aren't cheap. They're a cost that never delivers returns.

Choose wisely.

Kelvin Shawn spent three years at McKinsey before founding his own consultancy. He now helps businesses evaluate and hire the right consultants through Consultancy Register.