Skills · 15 June 2026 · 3 min read

How to Build a Money Case Backed by Real Numbers.

Saying you save people money is easy. Proving it is what wins deals. Here is how to build a simple money case from the buyer's own numbers, so they believe it.
Will Koning
Will Koning
Founder, meritt
meritt illustration: value articulation & business case

Here is a hard truth I learned the slow way. Buyers have heard we'll save you a ton of money a hundred times. The words mean nothing on their own. What changes their mind is a number they can check. A simple money case turns your promise into proof. Build one well, and you stop selling against a feeling and start selling against math.

The mistake most people make

Most people claim value with no numbers to back it up. They say things like you'll save hours or this pays for itself fast. It sounds good in the room. But the buyer goes home, runs the deal past their boss, and the boss asks one question: How much? Now your fan has nothing. No figure, no proof, just a nice feeling. And a nice feeling does not get budget approved. The deal stalls, and you never really know why.

What a good money case looks like

Good sellers show a believable case backed by real numbers. They do not pull figures out of thin air. They use the buyer's own numbers, the ones the buyer told them. Then they do simple, honest math anyone can follow. The case is small, clear, and easy to repeat. That last part matters most. Your buyer has to sell this to their boss when you are not in the room. Give them a number they can carry.

How to do it

Build a simple payback model from the buyer's own numbers

Ask what the problem costs them today, in their figures. Then show what your fix does to that number. Keep the math plain enough to do on a napkin.

You told me four reps quit last year, and each one costs about 40k to replace. That's 160k. If meritt helps you keep even half, that's 80k back.

Have the buyer check the numbers themselves

Do not present a case. Build it with them. When they confirm each figure, the case becomes their case, not yours. People defend numbers they helped write.

Does 40k per hire feel right to you, or is it higher? You know your real cost better than I do. Let's use your number.

See the difference

Weak

meritt will save you a fortune on hiring. Teams like yours usually see a big return, and it pays for itself in no time. No figures. No source. Nothing the buyer can take to their boss.

Strong

You said four reps left last year, and each replacement costs you about 40k. That's 160k a year walking out the door. If meritt cuts that loss in half, you keep 80k. The platform costs a fraction of that. Does that math hold up on your end?

Same product. Same saving. The strong version uses the buyer's own numbers and hands them a figure they can repeat. That is why it survives the trip to the boss.

How you'll know it's working

You have got this when you can show a believable case backed by real numbers, not a vague promise. Listen back to your last pitch. Did you say a figure the buyer agreed was theirs? Could they repeat it to their boss without you? If yes, you are there. Curiosity does the heavy lifting here. The best numbers come from good questions, asked early.

Questions people ask

How do I build a business case in sales?

Start with the buyer's own numbers, not yours. Ask what the problem costs them today, then show in plain math what your fix does to that figure. Keep it simple enough to do on a napkin. The goal is a small, clear number the buyer believes and can repeat to their boss when you are not in the room.

Why do my value claims not land with buyers?

Most likely because they are claims, not proof. Saying we'll save you money sounds the same as every other pitch the buyer has heard. What lands is a number tied to their own situation. Use figures they gave you, do the math out loud, and let them check it. A claim they confirmed beats a claim you stated.

Whose numbers should I use in the money case?

The buyer's, always. If you use your own averages, the buyer can argue with them. If you use their figures, the case becomes theirs and they defend it. Ask what each thing costs them, confirm it, and build on that. Your job is to do the math, not to invent the inputs.

What if the buyer does not know their numbers?

That is common, so help them find a rough one. Offer a sensible range and let them react: Is it closer to 30k or 50k to replace someone? A confirmed estimate beats a precise guess they never saw. Even a rough number they agree to is something they can take to their boss, which is the whole point.

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Four behaviours, role skills. Published in full.

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