Foundation 17 of 20 · Decide
Good Debt vs. Bad Debt: Is Borrowing Ever a Good Idea?
Debt Is a Tool. It Builds or It Breaks.
"Is borrowing ever a good idea?" If you never borrow, you may be safe and stuck. If you borrow without measuring, you may be neither. Here is the one test that separates good debt from bad debt, and how leverage cuts both ways.
Last Updated: 10/25/2026 · Written by Dr. Paul Borosky, DBA, MBA
The Short Answer
What Is the Difference Between Good Debt and Bad Debt?
Textbook Definition
Leverage is the use of borrowed capital to increase the potential return on an investment. Debt is considered productive when the expected return on what it finances exceeds the cost of the borrowing, and unproductive when it does not.
In Plain English
Good debt pays for something that will reasonably earn more than it costs, and you can show how before you sign. Bad debt pays for something unproven, or something that will never earn anything at all. The difference is not the lender. It is what you measured first.
Why It Matters
Why Do Careful Owners Stay Small?
Debt scares a lot of good owners, and it should, a little. Bad borrowing sinks businesses. But just as many businesses stay small for twenty years because the owner was afraid of borrowing the right thing at the right time. Every job too big for their own savings goes to a competitor.
Leverage is using borrowed money to do more than your own money could. Like a lever, it lets a small business lift something heavy. And like a lever, it works in both directions. If the investment pays, you have done far more than savings allowed. If it does not, you owe the money anyway.
Signs you have this problem:
- You turn down jobs because you lack one piece of equipment.
- You have never borrowed, and you are proud of it, and you are not growing.
- A competitor keeps winning the work you are "too booked" to take.
- You have borrowed before for something that never earned its keep.
- You decide about loans by feeling instead of numbers.
- You have never written down what could go wrong with a loan.
What It Looks Like
What It Looks Like When the Best Measurer Will Not Measure the Loan
From the Fabled Forest · Chapter 17
Blueprint Bella has built half the forest and never borrowed a coin. Her father lost his workshop to a loan he could not repay. Now the flour mill wants a new bridge, and only Bella can build it properly. But she needs a second crane, two hundred coins, and if she does not bid by Friday, Granite Gnaw will.
Doctor Owl asked her to do what she does best: measure it. The bank's loan would cost 240 coins in total. The bridge alone would leave 150 after crew and stone. Two more two-crane jobs she turned down every year would leave about a hundred each.
Isabelle from the bank checked one more angle: what if the mill delayed three months? Bella's ordinary work could still carry the payment. Every bad case was survivable. Her father had borrowed for a shop nobody wanted. Bella had measured. She signed, won the bridge at a fair price, and the second crane arrived Monday.
Bella's story is Chapter 17 of Accounting and Finance for Small Businesses, Book 2 of Dr. Paul's Fabled Forest Business School Series.
The Fix
How to Decide If a Loan Is Good Debt in 5 Steps
Four questions, answered in writing, before you sign. Then one honest decision.
What does the debt really cost?
The total you will pay back minus what you receive. Not the payment. Use the comparison from the cost of financing.
What will the borrowed money earn?
Write down the specific jobs, sales, or savings it makes possible, and how you know. A signed contract or a waiting list counts. A hunch does not.
How long until it pays itself back?
Divide the cost by what it earns each month. Shorter is safer. If the payback is longer than the life of the equipment, stop.
What happens if it goes wrong?
A delay, a cancelled job, a slow season, a breakdown. For each one, can the rest of the business still make the payment? Can you sell the asset if you have to?
Decide: good debt, bad debt, or not yet.
If it earns more than it costs, pays back in a reasonable time, and no bad case is fatal, it is good debt. If any of those fail, wait, test smaller, or save for it.
Dr. Paul's Insight
Most owners measure only the best case, and so do some lenders. The bad cases are where businesses actually get hurt. Write down the three most likely ways the plan could go wrong and run the numbers on each. If every one is painful but survivable, you can borrow with a clear head. If even one is fatal, the loan is too big, no matter how good the upside looks.
Sample: The Good Debt Check
Answer all four before you sign. If one answer is fatal, wait.
| What it costs | $24,000 total: $2,000 a month for 12 months, no fees. |
| What it earns | $15,000 from the bridge contract, plus about $20,000 a year from two-crane jobs now turned down. |
| Payback | The bridge covers most of it. One more job covers the rest. |
| If it goes wrong | Delay: ordinary work carries the payment. Cancelled: keep the deposit, sell the crane used for about $12,000, cover the rest from ordinary work. |
| Decision | Good debt. Every bad case is survivable. |
Sample for illustration. Use your own contracts, quotes, and worst cases.
Watch
Video: Good Debt vs. Bad Debt for Small Business
Good Debt vs. Bad Debt: Is Borrowing Ever a Good Idea?
Dr. Paul walks through the four-question good debt check on a real equipment decision.
From the Book
Measure It
Chapter 17 · Debt and Leverage
Measure Twice, Borrow Never: A Beaver's Loan
"And my crew will have six weeks with nothing to build. I'll have to let two of them go."
Doctor Owl had been standing quietly by the ficus. Now he sat on Bella's other side.
"Bella," he said. "May I ask you to do the one thing you do better than anyone in the forest?"
"Which is?"
"Measure it."
What did Bella find when she measured the loan she swore she would never take? Find out in Chapter 17. Book 2 of Dr. Paul's Fabled Forest Business School Series.
Get the Book on Amazon →FAQ
Debt and Leverage Questions
What is good debt for a business?
What is leverage in business?
When should a small business borrow money?
How much debt is too much?
Keep Going
Related Foundations
Debt and leverage connect four foundations, from what money costs to what it brings back. New to a term on this page? Every one is in the accounting and finance glossary.
Foundation 16 · Cost of Financing
Know the total cost of the money before you decide if it is worth it.
Foundation 18 · Return on Investment
Return on investment is how you measure what the debt will earn.
Foundation 5 · Balance Sheet
The balance sheet shows how much the business already owes.
Foundation 19 · Break-Even Analysis
Break-even tells you how much new work a financed purchase needs.
Written by Dr. Paul Borosky, DBA, MBA, business consultant, author, and educator with an MBA focused in finance. Thinking about borrowing to grow? See how fractional CFO services help you measure it first.
This page is for general educational purposes only. It is not legal, financial, tax, accounting, or lending advice. Tax rules change by place and by year. Dollar figures are illustrations. The Fabled Forest and its characters are fictional. For decisions about your own business, consult a qualified professional.