Resources · calculations

Calculators for your own business

Four simple calculations that come up in the lessons about money. They run right in your browser and send nothing anywhere. Use any currency, as long as it is the same in every field.

Economics of one customer

What it costs to bring in one customer, what that customer brings in over the time they stay, and how many months it takes to earn back the acquisition cost.

Acquisition spend per month ads, contractors, lead-finding services

New customers this month

What a customer pays per month

Margin, % the share of the payment left after direct costs for this customer

How many months a customer stays on average, from your experience or an honest estimate

Cost to acquire one customer

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Revenue per customer over time

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Profit per customer before acquisition

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Acquisition payback

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Left after acquisition

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How it is calculated

Acquisition cost = acquisition spend ÷ number of new customers.
Revenue per customer = monthly payment × months with the customer.
Profit per customer = payment × margin × months.
Payback = acquisition cost ÷ monthly profit per customer.

If payback takes longer than a customer stays with you, every new customer brings a loss.

Price of a service or product

Cost-based price: what to charge a client to cover your costs, pay taxes and fees, and keep the profit you want.

Direct costs per order subscriptions and services, materials, contractors for this order

Your hours per order

Your hourly rate what you want to earn for an hour of work

Overhead per order a share of rent, phone, training; you can leave this blank

Target profit, % of price

Taxes and fees, % of price sales tax, payment processor or marketplace fee

Cost of the order

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Price for the client

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Price rounded up

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Profit per order

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Taxes and fees

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How it is calculated

Costs = direct costs + hours × hourly rate + overhead.
Price = costs ÷ (1 − profit − taxes and fees), with the percentages taken from the price.

Profit here is a share of the price, not a markup on costs: 20% profit means that 20 out of every 100 in the price stay with you.

Break-even point

How many sales a month you need to cover your fixed costs. After this point every sale brings profit.

Monthly cost of your AI tool stack

List the services you use or plan to use, the plan price per month and the number of seats. If you pay yearly, enter the yearly price divided by 12. Current plans are on the What's current page and on the services' own sites.

Service	Price per month	Seats	Remove

Per month

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Per year

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Most expensive item

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These are learning calculations based on your own assumptions, not financial advice. The result is only as accurate as the numbers you enter. For taxes and reporting in your country, ask an accountant.