A new product line, a second location, a new service. Launches are exciting, and they're often exactly the right move. But when launches fail, they rarely fail because the idea was bad. They fail because of math that could have been done beforehand and wasn't.
Before committing the money, it's worth answering five questions with real numbers.
1. What will it really cost to launch?
Include everything, not just the obvious costs. Inventory or equipment, build-out, design and development, initial marketing, hiring and training, and your own time. Then add a buffer — launches almost always cost more than the first estimate.
2. What does each sale contribute?
Take the expected price and subtract every cost that comes with each sale: product cost, shipping, fees, returns, commissions and the advertising needed to win the customer. What's left is the contribution per unit. If that number is thin, the launch will struggle no matter how well it sells.
3. How much do you need to sell to break even?
Divide the total launch cost by the contribution per unit. (Illustrative: a $120,000 launch with $15 of contribution per unit needs 8,000 units to earn back the investment.) Then ask whether that volume is realistic, and how long it would take to get there given what you know about demand.
How many sales earn back the investment?
Illustrative launch-cost recovery calculation from the article: $120,000 ÷ $15 = 8,000 units. Include any additional ongoing fixed costs in the full break-even model; timing and cash requirements also matter.
4. What will it take away from the current business?
New lines often borrow from what already works. They can pull sales from existing products, pull cash out of inventory you already need, and pull your attention — and your team's — away from the core business. Put a rough number on each. A launch that adds $200,000 in sales but pulls $80,000 from existing products is a smaller launch than it looks.
5. What has to be true for this to work?
Write down the assumptions the plan depends on: the price customers will pay, how fast sales will build, what it will cost to acquire each customer, how quickly you can get the product or location running. Then ask which of those you've actually tested, and which are hopes.
Run three versions, not one
Once you have the numbers, build three simple scenarios:
- Expected case: what you realistically believe will happen.
- Downside case: slower sales, higher costs, a longer ramp.
- Upside case: what it looks like if things go better than planned.
The question isn't whether the expected case looks good. It usually does. The question is whether the business can live with the downside case — and whether the upside is worth the risk.
Know what to watch after launch
The same numbers that justify a launch should guide it once it's live. Decide in advance which two or three measures will tell you whether the launch is on track — sales pace against the break-even plan, cost to acquire each customer, and contribution per unit are usually enough. Set a checkpoint, perhaps 60 or 90 days in, and agree beforehand what result would mean pushing harder, adjusting, or pulling back. Making that call ahead of time is far easier than making it after money and pride are already invested.
A decision made with numbers
Good launches aren't guaranteed, but they're rarely surprises. An hour or two with these questions won't kill a good idea. It will tell you what the idea needs to succeed, what to watch once it's live, and when to change course. That's a much better place to launch from.