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Aquarium Break-Even Price Estimator

The Aquarium Break-Even Price Estimator calculates the average selling price needed for an aquarium-related product, maintenance service, livestock batch, or other defined offering to recover the costs you enter over a chosen planning horizon. It spreads one-time setup cost across expected sales, adds recurring monthly overhead, and includes variable cost per sale. The result provides a cost-recovery benchmark before profit or taxes.

This calculator is useful when testing the economics of a small aquarium service or sales activity without building a full financial model. Because different businesses classify labor, livestock losses, shipping, payment fees, equipment, and taxes differently, the output is only as complete as the inputs. Use consistent cost definitions and run conservative sales-volume scenarios when actual demand is uncertain.

Break-even assumptions

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sales
months
Result
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break-even price per sale
Fixed cost over horizon—
Expected sales over horizon—
Fixed cost per sale—
Total revenue needed—

1. Enter setup cost
Include one-time costs you want recovered during the selected planning horizon.

2. Enter monthly fixed overhead
Use recurring costs that do not rise directly with each sale in the simplified model.

3. Add variable cost per sale
Include costs that increase with each product or service unit sold.

4. Set expected monthly sales and horizon
Keep the sales estimate and monthly overhead aligned to the same planning period.

5. Review the break-even price
Compare the result with proposed pricing, then add any desired profit margin, taxes, or contingency separately.

Total fixed cost = Setup cost + (Monthly fixed overhead × Months) Total expected sales = Sales per month × Months Fixed cost per sale = Total fixed cost ÷ Total expected sales Break-even price = Fixed cost per sale + Variable cost per sale Total revenue needed = Break-even price × Total expected sales

The calculation assumes sales occur at the average monthly rate entered and that the included cost structure remains stable across the planning horizon.

What the result means

The main result is the average price per sale required for modeled revenue to equal modeled costs across the selected horizon.

Profit targets, taxes, financing costs, returns, losses, and unmodeled labor or inventory risk are excluded unless you incorporate them into the cost inputs.

Given: $2,400 setup cost, $650 monthly overhead, $28 variable cost per sale, 45 sales per month, and a 12-month horizon.

Calculation: Total fixed cost = $2,400 + ($650 × 12) = $10,200. Total sales = 45 × 12 = 540. Fixed cost per sale = $10,200 ÷ 540 = $18.89. Break-even price = $18.89 + $28 = $46.89.

Result: The modeled break-even price is about $46.89 per sale, requiring approximately $25,320 in total revenue.

Does the break-even price include profit?

No. It covers only the setup, fixed, and variable costs entered. Add a separate profit target if you want pricing above cost recovery.

Why does the planning horizon affect the result?

Setup cost is spread across all expected sales in the horizon. A longer horizon can reduce setup cost per sale if monthly sales remain unchanged.

Should owner labor be included?

Include it if you want the break-even result to recover that labor cost. You can place recurring owner labor in monthly overhead or sale-specific labor in variable cost, depending on how it behaves.

What if my sales volume is uncertain?

Run more than one scenario. A lower sales estimate spreads fixed costs over fewer units and produces a higher break-even price.

Can I use this for both products and services?

Yes, as long as you define one sale consistently and match variable cost and expected volume to that same unit of sale.