experienceopening

5 Common Mistakes When Opening an F&B Business

Published February 25, 2026 · Author: Khang Pham

According to statistics, over 60% of F&B businesses in Vietnam close within the first 18 months. Most fail not because of bad food — but because of avoidable financial and operational mistakes. Here are the 5 most common mistakes I see when advising new restaurant owners.

5 Most Common Mistakes

>Not budgeting enough capital: Many people only count construction + equipment costs, forgetting 3-6 months of working capital before the business stabilizes. Result: running out of money before getting established.
>Choosing the wrong location: Chasing a 'nice' location without calculating actual foot traffic, target customers, or whether rent exceeds 15-20% of projected revenue.
>Underestimating food costs: Actual food cost is typically 5-10% higher than recipe calculations due to waste, spoilage, and kitchen inefficiency.
>Hiring too many staff too early: A new business doesn't need a full team from day one. Staff salaries are fixed costs — bleeding money every month.
>No marketing plan: Assuming 'build it and they will come' — in reality, you need at least 3-5% of revenue for marketing in the first 6 months.

Expected vs Reality Comparison

Total initial investment+20-40%Construction overruns, permits, equipment replacements

Ingredient costs+5-10%Waste, spoilage, price fluctuations

Break-even timeline+6-12 monthsSlower ramp-up than expected

First month revenue-30-50%No brand awareness, no reviews yet

Staff costs+15-25%Insurance, overtime, turnover, training

Red Flags to Watch For

Working capital under 3 months

If you can't cover 3 months of operations without revenue, the risk is very high.

Rent above 20% of projected revenue

Overly expensive rent will eat all your profits, even if the business is busy.

No detailed cost spreadsheet

Opening a business without a financial model = flying blind.

Haven't tested before signing a lease

Test your concept through pop-ups or online sales first to validate real demand.

The good news is all these mistakes are preventable with proper preparation. Use Validator.vn to run your numbers before making decisions — know exactly when you'll break even, how many customers you need daily, and what your real costs look like.

Next →How to Calculate Cafe Startup Costs

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