What's my break-even point?

Bottomline calculates your fixed costs, variable costs, and average revenue per sale to show you the exact revenue level where you stop losing money.

Is my cost per customer going up?

Bottomline tracks your cost per acquisition across all channels and shows whether efficiency is improving or declining month over month.

Are my margins shrinking?

Bottomline tracks gross and net margin trends month over month and alerts you when margins decline for two or more consecutive periods.

Am I working harder for less money?

Bottomline tracks your revenue per hour of effort and compares it to your expenses, showing whether you are scaling or just adding complexity.

How many customers did I gain this month?

Bottomline counts new customers from your CRM and payment data and shows the trend month over month.

How many customers do I need per month to cover overhead?

Revenue targets are abstract. Customer counts are concrete. If you know you need 28 customers per month to keep the lights on, you can count your way to safety every week. Here's how to find your number.

6 min read

The short answer

Minimum customers per month = Monthly fixed costs / Average gross profit per customer. If your overhead is $42,000/month and each customer generates $1,500 in gross profit, you need at least 28 customers per month to break even.

Why customer count is a more useful target than revenue

“We need to hit $75,000 this month” is a statement about the scoreboard. “We need 28 customers this month” is a statement about the game. You can track customers weekly. By the 15th, if you only have 10 customers closed, you know you are behind and need to push harder in the second half.

It also makes marketing decisions clearer. If you need 28 customers and your ads are delivering 12, you know exactly how much ground referrals, repeat business, and outbound sales need to cover. The math becomes tangible.

The catch: this only works if your average customer value is relatively consistent. If you have a wide range (some customers are $500, others are $15,000), you need to segment by customer type or use the revenue-based break-even instead.

Three numbers that determine your minimum customer count

Monthly fixed costs (overhead). Rent, salaries, insurance, subscriptions, loan payments, utilities. Everything you pay whether you serve 0 customers or 100.
Average revenue per customer. Total revenue divided by total customers for a given period. If you did $82,000 from 34 customers last month, your average is $2,412.
Average gross profit per customer. Average revenue per customer multiplied by your gross margin. At a $2,412 average and 62% gross margin, you keep $1,495 per customer after variable costs.

How to calculate your minimum customer count in QuickBooks Online

1
Get your monthly fixed costs
Go to Reports→ “Profit and Loss” for the last 3 months. Look at Operating Expenses (below Gross Profit). Average them. This is your overhead.
2
Calculate average revenue per customer
Go to Reports→ “Sales by Customer Summary” for the same 3 months. Count the unique customers. Divide Total Income by that count.
3
Apply your gross margin
From the P&L, calculate gross margin: (Total Income - COGS) / Total Income. Multiply your average revenue per customer by the gross margin to get gross profit per customer.
4
Divide overhead by gross profit per customer
Monthly overhead / gross profit per customer = minimum customers. Round up. Example: $42,000 / $1,495 = 28.1, so you need 29 customers per month to break even.

Total time: about 15-20 minutes. Two reports, a customer count, and some division. The customer count is the part that requires manual work in QuickBooks.

How to calculate your minimum customer count in Xero

1
Get fixed costs and gross margin from the P&L
Go to Accounting → Reports→ “Profit and Loss” for the last 3 months. Xero shows Gross Profit directly. Note Total Operating Expenses (your fixed costs) and calculate gross margin (Gross Profit / Total Revenue).
2
Get your customer count
Go to Accounting → Reports→ “Income by Contact.” Count unique contacts with income for the period. Divide total revenue by customer count for the average.
3
Calculate minimum customer count
(Average revenue per customer x gross margin) = gross profit per customer. Monthly overhead / gross profit per customer = minimum customers. Round up.

Total time: about 15 minutes. Xero's Income by Contact report makes the customer count easier than in QuickBooks.

Why your minimum customer count changes over time

Overhead creeps up. Every new tool, hire, or lease bumps your minimum customer count. Small cost additions compound.
Average deal size shifts. If your average customer value drops (smaller projects, more discounts), you need more customers to cover the same overhead.
Margin changes affect the math. Material cost increases, subcontractor rate bumps, or pricing pressure all reduce gross profit per customer and increase the count needed.

Or see your minimum customer count updated automatically

Bottomline connects to your QuickBooks or Xero account (plus your CRM and payment processor) and calculates your minimum customer count every month:

Customer count analysis

Monthly overhead$42,400

Avg. revenue per customer$2,480

Gross margin58.2%

Gross profit per customer$1,443

Minimum customers to break even30

Customers this month36

You are 6 customers above break-even. That is a 20% buffer. Note: minimum count rose from 28 to 30 this month after adding a new software subscription ($1,200/mo).

From a real Bottomline report. Your minimum customer count recalculated each month as costs and margins shift.

Because Bottomline connects to your CRM, it also shows you how many customers are in your pipeline, your close rate, and whether your current pipeline is likely to hit the minimum. You see the target and your trajectory toward it in one place.