Why You Can't Rely Only on Customers When Rent Is High — Numbers to Check Before Signing a Lease

Rent is not a portion of monthly sales—it's the living expense that keeps a store running. Even with many customers, a shop won't last long if there's no money left in the bank. So deciding on rent is not just a matter of location judgement; it's a cash-flow judgment.

A busy shop is the result of menu, pricing, visual appeal, storytelling, and operations all working together. If you can afford higher rent, you have room to invest in those elements; but if rent is too high, money for good ingredients and staff disappears. Rent is a cost to maintain the means of attracting customers, not the means itself.

In practice, there are three main criteria. First is projected monthly sales based on expected daily customers and average spend. Second is the schedule of cash inflows and outflows, such as ingredient payment dates and card-sales deposit dates.

Third is the contract structure, including initial security deposit and any rent increase in lieu of deposit.

Instead of abstract ratios like profit-loss percentages, calculate in practical terms. Start with expected daily customers and average spend to estimate monthly sales. From that sales figure, subtract cost of goods, labor, delivery fees, and waste to find what remains in the bank.

That remaining amount must cover the monthly rent, taxes and utilities, and an emergency buffer.

A common cash-flow pitfall is timing. Card sales are usually deposited on a T+1 to T+2 schedule, suppliers bill ingredient costs on fixed days each month, rent is due at the start of each month, and the security deposit is a large outflow at contract signing.

If those dates are misaligned, a bank balance can look healthy but still suffer a cash shortage.

For example, assume a small noodle shop projects 80 customers per day with an average spend of ₩8,000. Ingredient payments fall on the 7th of each month, and card deposits arrive on a T+2 business-day basis. With a security deposit of ₩10,000,000 and monthly rent of ₩2,500,000, the calculation shows that the first month or two will require covering operating costs from the bank balance.

The execution steps are simple. First, combine daily customers and average spend to form a realistic monthly sales figure. Next, subtract ingredient costs, labor, delivery fees, and waste to understand the monthly operating-cost structure.

Finally, check whether the remainder can cover monthly rent, and assess how the timing differences between deposits and payments affect the bank balance.

Negotiation points are about structure. You can spread risk by increasing the security deposit and lowering monthly rent, or proposing a temporary sales-linked rent scheme. Clearly specifying card-settlement cycles and whether management fees are included in the contract helps operations a lot.

Before signing, confirm how card-sales deposit dates and ingredient payment dates align with your bank balance.