What is opportunity cost in business?

Opportunity cost is the return you give up when you choose one option over another. For example, if you choose to work in the kitchen instead of negotiating a promotion with a delivery platform, your opportunity cost is the potential return from that promotion.

What is sunk cost and why is it dangerous?

Sunk cost is money you have already spent and cannot get back. It is dangerous because owners make emotional decisions based on past investments, throwing good money after bad. When making a decision, ask: from today, will this bring profit? If not, stop.

What is marginal cost and when should you stop?

Marginal cost is the additional cost of producing one more unit. Many owners think more sales is always better, but marginal cost tells you when to stop — when the extra effort and cost are not worth the return.

Why are rent, staff, and ingredients not the most important costs?

Because opportunity cost, sunk cost, and marginal cost have a greater impact on long-term success. They determine whether you are making smart decisions, letting go of bad investments, and knowing when to stop.

The True 3 Costs You Ignore That Keep Your Business Alive (Not Rent, Staff, or Ingredients)

The True 3 Costs You Ignore That Keep Your Business Alive (Not Rent, Staff, or Ingredients)

Published: 17th June 2026

Video

In this video, we answer:

What are the 3 true costs that determine business success or failure?
Why are rent, staff, and ingredients NOT the most important costs?
What is opportunity cost and why does it matter?
Why is your time more valuable than you think?
What is sunk cost and why do owners fall into the sunk cost trap?
Why should you let go of past investments when making decisions?
What is marginal cost and why does it spike?
Why is “more sales” not always better?
When should you stop selling more?
How can you apply these 3 costs to your business?

Key takeaways

The hook:Most owners know their rent, staff, and ingredient costs. But today, I will show you the 3 true costs that determine your success or failure. And they are not what you think.
Cost #1 – Opportunity cost: Opportunity cost is the return you give up when you choose one option over another. This morning you had two choices: stay in the kitchen to monitor quality, or negotiate a promotion with a delivery platform. You chose option one. Your opportunity cost is the potential return from the promotion you did not pursue. Every time you choose one thing, you give up the returns from another. You are not ‘saving money’ by working in your restaurant. You are losing the returns from opportunities you never took. Ask yourself: what are you giving up, and how much is it worth?
Cost #2 – Sunk cost: Sunk cost is money you have already spent and cannot get back. You invested 500 thousand ringgit to renovate your restaurant. One year later, you realize the location is bad. The sensible decision? Close and find a new spot. But you refuse because you cannot accept losing 500 thousand. So you invest another 200 thousand to sustain it for one more year. Then you close anyway. The 500 thousand was gone. The 200 thousand was also gone. Sunk cost is emotional, not logical. When making a decision, ask yourself one question only: from today, will this decision bring profit? If not, stop. That money is already spent. It should not influence your next move.
Cost #3 – Marginal cost: Marginal cost is the additional cost of producing one more unit. Your noodle shop sells 100 bowls a day. From bowl 50 to bowl 100, your cost is low — rent, staff, and equipment are already paid for. But to sell 120 bowls, you need to hire another person and buy more equipment. Your cost spikes. Many owners think more sales is always better. But greed is not a strategy. The additional resources, time, and stress do not always reward you with more income. Marginal cost tells you when to stop. Not because you cannot sell more. Because the return is not worth the extra effort.
Recap: Opportunity cost tells you how much your time is worth. Sunk cost frees you from past investments. Marginal cost tells you when to stop.
The final message: Master these 3 costs. Stop counting only rent, staff, and ingredients. Focus on what you give up, what you cannot get back, and when to stop. Share with us which cost you struggle with the most. Stay smart. Stay profitable.

Full transcript

Voice specification: Male, deep, confident, American accent. Speak clearly, not rushed. Pause briefly at each [PAUSE].

[0:00-0:07] — Hook

Visual: Text on screen – “Rent, staff, ingredients… these are NOT your biggest costs.” Then show a business owner looking at a P&L statement with confusion.

Voice:
“Most owners know their rent, staff, and ingredient costs. But today, I will show you the 3 true costs that determine your success or failure. And they are not what you think. [PAUSE]”

[0:07-0:24] — Cost #1: Opportunity Cost

Visual: Split screen – left shows an owner working in the kitchen, right shows a phone with a delivery platform logo and money icons. Text: “Option 1 vs Option 2.”

Voice:
“Cost number one: Opportunity cost. This morning you had two choices. Option one: stay in the kitchen to monitor quality. Option two: negotiate a promotion with a delivery platform. You chose option one. Your opportunity cost? The potential return from the promotion you did not pursue. Every time you choose one thing, you give up the returns from another. You are not ‘saving money’ by working in your restaurant. You are losing the returns from opportunities you never took. Ask yourself: what are you giving up, and how much is it worth? [PAUSE]”

[0:24-0:42] — Cost #2: Sunk Cost

Visual: Show a restaurant renovation with money flying away. Then show the same owner pouring more money into a failing shop. Text: “Emotional decision, not logical.”

Voice:
“Cost number two: Sunk cost. This is money you have already spent and cannot get back. You invested 500 thousand ringgit to renovate your restaurant. One year later, you realize the location is bad. The sensible decision? Close and find a new spot. But you refuse because you cannot accept losing 500 thousand. So you invest another 200 thousand to sustain it for one more year. Then you close anyway. The 500 thousand was gone. The 200 thousand was also gone. Sunk cost is emotional, not logical. When making a decision, ask yourself one question only: from today, will this decision bring profit? If not, stop. The past is already gone. [PAUSE]”

[0:42-0:58] — Cost #3: Marginal Cost

Visual: Show a noodle shop with 100 bowls sold. Then show the owner hiring extra staff and buying equipment. Text: “More sales = more costs.”

Voice:
“Cost number three: Marginal cost. Your noodle shop sells 100 bowls a day. From bowl 50 to bowl 100, your cost is low — rent, staff, and equipment are already paid for. But to sell 120 bowls, you need to hire another person and buy more equipment. Your cost spikes. Many owners think more sales is always better. But greed is not a strategy. The additional resources, time, and stress do not always reward you with more income. Marginal cost tells you when to stop. Not because you cannot sell more. Because the return is not worth the extra effort. [PAUSE]”

[0:58-1:05] — Recap

Visual: Three icons appear one by one – (1) Clock = Opportunity Cost, (2) Broken building = Sunk Cost, (3) Stop sign = Marginal Cost.

Voice:
“So let us recap. Opportunity cost tells you how much your time is worth. Sunk cost frees you from past investments. Marginal cost tells you when to stop. [PAUSE]”

[1:05-1:12] — Conclusion

Visual: Host looks directly at camera. Text on screen: “Master these 3 costs. Stop counting the wrong things.”

Voice:
“Master these 3 costs. Stop counting only rent, staff, and ingredients. Focus on what you give up, what you cannot get back, and when to stop. Share with us which cost you struggle with the most. Stay smart. Stay profitable.”

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