There are certain sentences you hear so often in business consulting that eventually they stop sounding like sentences and start sounding like smoke alarms.
One of them is:
“We don’t really have competitors.”
Another:
“Everyone is our customer.”
Then there is the perennial classic:
“We only need 1% of the market.”
And, usually delivered in a slightly lower voice:
“Can you just make the numbers look a little better?”
After more than 20 years working with entrepreneurs, startups and established businesses, I have discovered that the biggest problems in business plans are rarely commas, fonts or whether the Executive Summary is two pages or three.
The real problems are usually assumptions.
Bad assumptions are remarkably resilient.
Put them into Excel.
Add a graph.
Export everything to PDF.
Place a stock photograph of two people shaking hands in front of a glass office building on the cover.
Suddenly the assumption feels institutional.
It is still wrong.
It just has branding now.
Key Takeaways
- The most dangerous business plan myths concern markets, competition, growth, funding and financial assumptions, not document formatting.
- “We have no competitors” usually means the competitive analysis has not gone far enough.
- “Everyone is our customer” is not market segmentation.
- Revenue forecasts should connect directly to capacity, staffing, marketing, working capital and operating costs.
- Templates and AI can be extremely useful tools, but neither can supply evidence that does not exist.
- A profitable business can still fail because it runs out of cash.
- A good business plan consultant should challenge the founder rather than professionally applaud every assumption.
- The purpose of a professional business plan is not to make an idea look attractive. It is to establish whether the commercial case is credible and defensible.
What Are the Most Common Business Plan Myths?
The most common business plan myths are surprisingly persistent: founders underestimate competition, exaggerate market size, overestimate growth, underestimate costs and working capital, assume funding requirements rather than calculate them, and mistake a polished document for a credible investment case.
Here are the eleven business plan myths I still encounter.
Business Plan Myth 1: “We Don’t Really Have Competitors”
This is probably my favourite.
It is usually followed by something like:
“We’re the Uber of pizzas.”
Or:
“Think Airbnb, but for accountants.”
Sometimes:
“There is literally nothing else like this.”
Wonderful.
Neither Uber nor Airbnb has achieved the remarkable commercial feat of having no competitors, but apparently your app has managed it before launch.
A competitor does not need to sell exactly the same thing.
Your competition includes:
- direct rivals;
- substitutes;
- existing technology;
- alternative suppliers;
- internal solutions;
- doing nothing;
- and customers deciding that the problem simply is not worth paying to solve.
If you sell gourmet pizza delivery, your competitors are not limited to other gourmet pizza delivery businesses.
They include:
- restaurants;
- delivery apps;
- supermarkets;
- frozen pizza;
- home cooking;
- takeaway outlets;
- and the customer deciding that tonight is a toasted-cheese evening.
That last competitor has a particularly aggressive pricing strategy.
Why Is “We Have No Competitors” a Warning Sign?
Because it usually indicates that the founder has defined competition too narrowly.
The right question is not:
“Who sells exactly what we sell?”
It is:
“How does our customer solve this problem today?”
That question produces much better market research.
Business Plan Myth 2: “Everyone Is Our Target Market”
I ask:
“Who buys this?”
The answer:
“Everyone.”
Excellent.
Eight billion prospects.
We can close the marketing department.
Unfortunately, “everyone” is not a market segment.
A 21-year-old student in Stellenbosch and a 64-year-old manufacturing CEO in Germiston are both human beings.
That is where most of the commercial similarity ends.
Real target-market analysis asks:
- Who experiences the problem?
- Who controls the purchasing decision?
- Who can afford the solution?
- Where are they?
- How do they currently solve the problem?
- How frequently do they buy?
- How expensive are they to reach?
If your answer to “Who is the customer?” is “people”, we have further work to do.
Business Plan Myth 3: “We Only Need 1% of the Market”
Possibly the most efficient business strategy ever invented.
The market is worth R100 billion.
Therefore:
1% = R1 billion.
Business plan complete.
By the same logic, I only need a tiny percentage of Apple.
I have informed my bank manager.
The difficulty is that you don’t get market share by typing 1% into Excel.
You still need to explain:
- Which customers make up that 1%?
- Why will they switch?
- How will you reach them?
- What will customer acquisition cost?
- What distribution capacity is required?
- Which competitors lose those customers?
- How long will that take?
Why Do Founders Overestimate Market Size?
Because founders often confuse the total market with the portion they can realistically serve.
If South Africans spend R50 billion in your broad industry, that does not mean your startup has a R50 billion addressable market.
You may serve:
one province;
one demographic;
one price segment;
one distribution channel;
one product category.
The useful number is not the biggest one available.
It is the one that describes the market your business can realistically access.
Business Plan Myth 4: “Just Make the Numbers Look Good”
This one usually comes up after the meeting has become comfortable.
The founder looks at the financial model.
Pauses.
Then:
“Obviously we need the projections to look attractive for the funder.”
Correct.
Ideally because the business itself is attractive.
Not because Excel has been asked to participate in organised crime.
I have seen versions of forecasts where:
- revenue triples every year;
- staff remain unchanged;
- rent never increases;
- customers pay immediately;
- suppliers provide unlimited credit;
- electricity apparently becomes cheaper;
- marketing disappears after Year 1;
- equipment never needs replacing;
- nobody takes leave;
- bad debts cease to exist;
- and working capital has apparently been abolished by Parliament.
By Year 5, EBITDA margins are 62%.
There are still four employees.
Brenda in accounts has clearly become one of the most productive people in Africa.
How Realistic Should Business Plan Financial Projections Be?
Realistic enough that management can explain how the business physically achieves them.
If sales double, ask what else changes.
Do you need:
- additional staff?
- more machinery?
- more stock?
- additional premises?
- higher marketing expenditure?
- increased working capital?
- larger debtor balances?
- additional vehicles?
Revenue does not grow alone.
It brings friends.
For more on this, see JTB Consulting’s guide to Financial Projections for a Business Plan.
Business Plan Myth 5: “The Funder Won’t Check That”
They may.
And if the application progresses, somebody will eventually ask the question every spreadsheet fears:
“Where did this number come from?”
There are two possible answers.
Good answer:
“It is based on current supplier quotations, existing customer pricing, achievable production capacity and our signed sales pipeline.”
Less good answer:
“It was already in the template.”
A credible financial model has lineage.
Important assumptions should trace back to something:
- a supplier quotation;
- historic performance;
- a contract;
- a management assumption;
- an industry benchmark;
- market research;
- a capacity calculation.
Otherwise, you do not have financial modelling.
You have numerology with borders around the cells.
Business Plan Myth 6: “A Template Is Basically the Same Thing”
Templates are not evil.
I like templates.
Templates stop people reinventing basic structures every Tuesday.
But a template gives you architecture.
It does not give you your business.
I have reviewed versions of South African business plans where:
- some schedules were in rand;
- others were still in dollars;
- one model referred to “State Sales Tax”;
- another wanted a ZIP code;
- the cash flow contained #DIV/0!;
- the debt schedule contained #NUM!;
- and a formula linked to a workbook that presumably died on someone’s laptop during the Zuma administration.
My favourite localisation method remains:
Find $. Replace with R.
Done.
South Africa.
Except:
the tax assumptions are American;
VAT is missing;
wages are from another country;
and the business somehow pays rent per square foot.
Are Business Plan Templates a Bad Idea?
No.
Templates are excellent for:
- structure;
- prompts;
- checklists;
- consistency.
They become dangerous when generic:
- assumptions;
- market data;
- formulas;
- costs;
- margins;
- tax;
- funding structures
are accepted as though they belong to your business.
Use the template.
Do not inherit somebody else’s economics.
Business Plan Myth 7: “AI Can Write the Whole Thing Now”
AI is extraordinarily useful.
I use it.
You probably use it.
Your accountant probably uses it while pretending not to.
AI can help with:
- structure;
- drafting;
- brainstorming;
- research;
- summarisation;
- sensitivity questions;
- document review.
The problem begins when somebody mistakes confidence for evidence.
AI can write a beautifully phrased paragraph about:
your market;
your customers;
your competitors;
your regulations;
your industry size.
Occasionally it will do this about a statistic that does not exist.
Can AI Write a Credible Business Plan?
Yes, but only if credible evidence and commercially sound assumptions sit underneath it.
AI can improve the document.
It cannot magically create:
- signed customers;
- supplier quotations;
- correct margins;
- operating capacity;
- working capital;
- management experience.
The real danger is not that AI writes badly.
It often writes remarkably well.
The danger is that unsupported nonsense can now arrive with excellent grammar.
For a deeper comparison, see AI Business Plan Writer vs Professional Consultant.
Business Plan Myth 8: “If We’re Profitable, We Won’t Run Out of Cash”
Oh, you absolutely can.
And businesses do.
Often while the Income Statement looks delighted with itself.
Suppose:
- customers pay after 60 days;
- suppliers require payment after 30 days;
- stock sits for 45 days;
- payroll happens every month.
The company can report a profit while cash quietly leaves the building carrying a suitcase.
Why Is Working Capital Often Underestimated?
Because founders naturally focus on profitability.
Working capital focuses on timing.
Growth usually requires cash before the customer pays.
You may need to finance:
- inventory;
- wages;
- raw materials;
- VAT;
- debtor balances;
- operating expenses.
One of the most dangerous assumptions in a growth plan is:
“Cash flow will improve because sales increase.”
Sometimes.
Sometimes sales increase so quickly that the business runs out of cash even faster.
Growth is surprisingly expensive.
Business Plan Myth 9: “Growth Will Fix the Problem”
This deserves its own plaque.
Consider a composite scenario built from patterns I have seen repeatedly.
One branch loses R100,000 per month.
The proposed solution:
“We’ll open four more branches. Scale will fix it.”
Possibly.
But if the economics remain unchanged:
5 × R100,000 = R500,000 loss per month.
Congratulations.
You have successfully scaled.
Just in the wrong direction.
Scale works when something improves:
- purchasing power;
- fixed-cost absorption;
- utilisation;
- customer-acquisition economics;
- distribution;
- technology leverage.
If nobody can explain what improves with scale, multiplying locations simply multiplies the current economics.
Sometimes the best expansion strategy is:
Make the first one work.
Not particularly inspirational.
Potentially excellent for shareholders.
Business Plan Myth 10: “R10 Million Should Be Enough”
“What will the R10 million fund?”
“Expansion.”
Useful.
Expansion apparently costs exactly R10 million this year.
A proper funding requirement may look like this:
| Use of Funds | Amount |
| Machinery | R4.2 million |
| Premises fit-out | R1.1 million |
| Initial inventory | R1.5 million |
| Implementation | R700,000 |
| Working capital | R2.1 million |
| Contingency | R400,000 |
| Total | R10.0 million |
Now the figure means something.
Maybe the correct answer is R8.7 million.
Maybe R12.4 million.
The point is that it has been calculated.
A funding requirement should be the consequence of the business plan and financial model.
Not a number selected because it sounded respectable during breakfast.
Business Plan Myth 11: “A Good Consultant Should Agree With Me”
Absolutely not.
You already have friends.
The consultant’s job is different.
Nobody enjoys paying someone to say:
“I don’t think this works.”
But sometimes that sentence is worth considerably more than the report.
A good consultant may tell you:
- the market is smaller than expected;
- the price is too low;
- the price is too high;
- the margin is impossible;
- the working-capital requirement is understated;
- the business needs more funding;
- the business needs less funding;
- expansion is premature;
- the project needs a feasibility study first.
Occasionally the correct answer is:
“Not yet.”
Sometimes:
“Not this way.”
Sometimes simply:
“No.”
That is not negativity.
That is the part you are actually paying for.
What Assumptions Make a Business Plan Unrealistic?
A business plan becomes unrealistic when its assumptions stop behaving like parts of the same business.
Here is the quickest test:
| Unrealistic Assumption | Why It Fails |
| Sales grow rapidly, staff stay flat | Capacity does not reconcile |
| Market share appears instantly | No acquisition mechanism |
| Customers pay immediately | Working capital understated |
| No bad debts | Credit risk ignored |
| No maintenance CAPEX | Assets apparently become immortal |
| Marketing falls while sales accelerate | Customer acquisition unexplained |
| Margins rise sharply with no reason | Profitability unsupported |
| No competitor response | Market treated as passive |
| Founder takes no salary forever | Owner economics understated |
| Funding is a round number | Use of funds not calculated |
| Terminal cash never falls below zero | Downside case ignored |
A useful model asks:
If this assumption happens, what else must happen?
That single question catches an extraordinary amount of nonsense.
What Makes a Business Plan Look Unprofessional to Investors or Funders?
It is usually not the font.
A business plan looks unprofessional when the evidence, narrative and numbers contradict each other.
Warning signs include:
- spreadsheet errors;
- inconsistent currencies;
- copied sections from unrelated businesses;
- unsupported market statistics;
- no clear funding requirement;
- forecasts that cannot be traced to assumptions;
- business-plan claims that contradict the financial model;
- old quotations;
- generic competitor research;
- inconsistent company names;
- a cash-flow forecast that does not reconcile with the Balance Sheet;
- and financial schedules that nobody on the management team can explain.
One beautifully designed page cannot compensate for an application whose numbers contradict page 37.
For a detailed selection framework, see How to Choose a Professional Business Plan Writer.
Why Do Business Plans Fail Even When the Business Idea Is Good?
Because the business and the document are not the same thing.
I have seen composite versions of perfectly credible businesses with:
- real customers;
- competent management;
- good margins;
- signed contracts;
- credible growth opportunities.
Then you open the business plan.
The funding amount is hidden on page 41.
The Executive Summary says everything except what the company wants.
The market section explains that:
“Africa is a growing continent.”
Thank you.
The financial model contradicts the written strategy.
The strongest evidence appears in Appendix 17.
The company may still be investable.
But the document has turned discovering that fact into an archaeological exercise.
The decision-maker cannot assess the company you meant to describe.
They assess the one presented.
What Should a Business Plan Consultant Challenge?
A proper business plan consultant should challenge at least these areas:
Market
- Is there enough demand?
- How was market size determined?
- Who are the real competitors?
- Why will customers switch?
Revenue
- What creates each sale?
- How many customers are required?
- How long does acquisition take?
- What capacity supports the forecast?
Costs
- Are costs complete?
- Which costs rise with growth?
- What inflation has been assumed?
Operations
- Can the company physically deliver the forecast?
- Is equipment sufficient?
- Are staffing assumptions realistic?
Working Capital
- When do customers pay?
- When are suppliers paid?
- How much stock must be held?
Funding
- How much money is genuinely required?
- What exactly funds each use?
- Is owner contribution sufficient?
Risk
- What happens if sales are 20% lower?
- What happens if implementation is delayed?
- What happens if input costs rise?
A consultant who never challenges you is not providing much consulting.
They may simply be taking dictation with invoicing software.
Business Plan Myths vs Reality
| Myth | Reality |
| We have no competitors | Customers always have alternatives |
| Everyone is our customer | Markets need segmentation |
| We only need 1% | Market share requires execution |
| Make the numbers attractive | Make assumptions defensible |
| The funder won’t check | Material assumptions face scrutiny |
| A template is enough | Templates give structure, not evidence |
| AI can do everything | AI still needs credible inputs |
| Profit means cash | Timing can destroy profitable businesses |
| Growth fixes bad economics | Scale can magnify losses |
| R10m should be enough | Funding must be calculated |
| Consultants should agree | Good advisers challenge |
10 Questions to Ask Before Paying Someone to Prepare Your Business Plan
Before appointing anyone, ask:
- Who will actually prepare the business plan?
- Who builds the financial model?
- How will revenue assumptions be tested?
- Where will the market research come from?
- How will competitors be assessed?
- How will working capital be calculated?
- Will I receive the editable Excel model?
- What happens if you think the project is not viable?
- Which assumptions will you expect me to prove?
- Can you explain the numbers to me in plain English?
The most important might be number eight.
If the person you hire has no mechanism for ever telling you:
“This does not make commercial sense.”
then you may not have hired an adviser.
You may have hired a very expensive typist.
Frequently Asked Questions About Business Plan Myths
What are the most common business plan myths?
Common myths include believing there are no competitors, treating everyone as the target market, assuming a small percentage of a huge market is automatically achievable, underestimating working capital, expecting revenue growth without corresponding costs and assuming a polished document can compensate for weak underlying assumptions.
What assumptions make a business plan unrealistic?
The biggest warning sign is inconsistency. Revenue may grow without additional staff, equipment, stock, marketing or working capital. A realistic business plan should explain how each major operational and financial assumption connects to the others.
Why do founders overestimate market size?
Founders often use total industry size instead of the realistically addressable market. Geography, customer type, price, distribution capacity and competition can reduce the actual accessible market substantially.
Why is “we have no competitors” a warning sign?
Because customers normally have alternative ways to solve the same problem. Even without a direct competitor, substitutes, incumbent processes and doing nothing can all compete for the customer’s money.
How realistic should business plan financial projections be?
Realistic enough that management can explain the commercial mechanism behind them. Forecast sales should connect to price, customer volumes, capacity, staffing, costs, working capital and investment requirements.
What makes a business plan look unprofessional to investors?
Broken spreadsheet formulas, unsupported market claims, conflicting financial schedules, inconsistent currencies, copied content, unclear funding requirements and assumptions that cannot be traced back to evidence all weaken credibility.
Are business plan templates a bad idea?
No. Templates provide useful structure. They become risky when generic market information, financial assumptions or formulas are reused without being validated for the actual business.
Can AI write a credible business plan?
Yes, but only when the underlying data and assumptions are credible. AI can improve research, structure and writing, but it cannot substitute for evidence, management knowledge, financial logic and professional judgement.
Why is working capital often underestimated?
Because entrepreneurs focus on profit rather than timing. Rapid growth can increase stock, debtor balances and payroll requirements before customer cash arrives.
Why do business plans fail even when the business idea is good?
A strong business can still be presented poorly. If the market evidence, funding request, strategy and financial model are unclear or inconsistent, a decision-maker may struggle to understand the underlying opportunity.
What should a business plan consultant challenge?
A competent consultant should challenge market size, pricing, sales forecasts, operating capacity, staffing, costs, working capital, funding requirements, implementation assumptions and risk.
What 20 Years of Business Planning Has Taught Me
Entrepreneurs are optimists.
They have to be.
Nobody leaves a salary, mortgages the house and launches biodegradable dog bowls because they are fascinated by downside sensitivity analysis.
Optimism starts businesses.
But optimism needs friction.
Sometimes the friction is market research.
Sometimes it is the financial model.
Sometimes it is a mildly irritating consultant saying:
“Your Uber-for-pizza business currently has fourteen competitors, and three of them already deliver pizza.”
That is not negativity.
That is useful information.
And useful information discovered before you borrow R20 million is generally cheaper than discovering it afterwards.
So after more than two decades of doing this, my advice is straightforward:
Do not pay somebody to make your business idea look good. Pay somebody to help determine whether it is good. Then, if it is, make damn sure the business plan proves it.
Need Professional Business Planning Support?
JTB Consulting has specialised in business planning, financial modelling, feasibility studies and strategic advisory work since 2006.
Where meaningful funding or investment decisions are involved, the objective is not to produce the longest document or the prettiest forecast.
The objective is to ensure that:
- market evidence;
- strategy;
- operating assumptions;
- funding requirement;
- risk; and
- financial model
form one coherent business case.
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