Amazon Break Even Calculator
Amazon sellers have monthly fixed costs that exist whether you sell or not: Seller Pro account, software tools, outsourced VA, storage rent, and baseline advertising retainers. Per unit you pay referral fee, FBA or FBM fulfillment, product cost, and prep. This calculator turns your Amazon unit math into a monthly break-even unit goal, daily sales needed, and break-even revenue so you know when inventory actually starts paying you back.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Fixed costs
Pro account, tools, rent, VA, flat ad retainers.
Per unit economics
Amazon listing price per unit.
Sourcing cost per unit.
Referral amount plus FBA/FBM per order.
Packaging, inbound amortized, coupon allowance.
Volume
To estimate days to break even.
Results
Live estimates based on your inputs and editable fee assumptions.
Contribution per unit
$11.99
Price minus product, fees, and variable costs.
Break-even units per month
26
Units needed to cover monthly fixed costs.
Break-even revenue
$779.74
Revenue needed to break even.
Units per day to break even
0.87
Monthly BE divided by 30.
Days to break even at current velocity
5.20
BE units divided by daily sales estimate.
Monthly fixed costs
$300.00
Fixed overhead to cover.
Contribution margin %
40.0%
Contribution divided by price.
What this means
You need 26 units this month ($779.74 revenue) to cover $300.00 fixed. Contribution $11.99 per unit (40.0%). Need 0.9/day. At 5/day you break even in 5.2 days.
Fixed costs vs contribution at break-even
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Fixed costs$300.0027.8%
- Product + other variable at BE$247.0022.9%
- Amazon fees at BE$221.0020.5%
- Contribution at BE$311.7428.9%
Total $1,079.74 · 4 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Price per unit
- $29.99
- Variable per unit
- $18.00
- Contribution per unit
- $11.99
- Monthly fixed
- $300.00
- Break-even units
- 26
- Break-even revenue
- $779.74
- Units/day needed
- 0.87
- Days to break even
- 5.20
- Contribution margin
- 40.0%
Assumptions used
- • Variable per unit $18.00 = product $8.00 + Amazon fees $8.50 + other $1.50
- • Contribution $11.99 = price $29.99 - variable $18.00
- • Break-even = fixed $300.00 ÷ contribution $11.99
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Amazon Break Even Calculator
Generated 7/30/2026, 5:49:22 AM · Currency USD
Inputs
- Monthly fixed costs: 300
- Selling price per unit: 29.99
- Product cost per unit: 8
- Amazon fees per unit (referral + fulfillment): 8.5
- Other variable costs per unit: 1.5
- Estimated sales per day: 5
Results
- Price per unit: $29.99
- Variable per unit: $18.00
- Contribution per unit: $11.99
- Monthly fixed: $300.00
- Break-even units: 26
- Break-even revenue: $779.74
- Units/day needed: 0.87
- Days to break even: 5.20
- Contribution margin: 40.0%
Interpretation
You need 26 units this month ($779.74 revenue) to cover $300.00 fixed. Contribution $11.99 per unit (40.0%). Need 0.9/day. At 5/day you break even in 5.2 days.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Variable per unit = productCost + amazonFeesPerUnit + otherVariableCosts.
- 2Contribution = sellingPrice - variable.
- 3Break-even units monthly = monthlyFixedCosts / contribution, rounded up.
- 4Break-even revenue = breakEvenUnits * sellingPrice.
- 5Units per day needed = breakEvenUnits / 30.
- 6Days to BE = breakEvenUnits / salesVelocityPerDay.
Formulas
- Variable = product + AmazonFees + otherVariable
- Contribution = price - variable
- BE Units = ceil(fixed / contribution)
- BE Revenue = BE Units × price
- Units/Day = BE Units ÷ 30
- DaysToBE = BE Units ÷ dailyVelocity
Important assumptions
- Revenue per unit is selling price.
- Total variable per unit equals productCost + amazonFeesPerUnit + otherVariableCosts.
- Contribution per unit = sellingPrice - totalVariable.
- Break-even units = ceil(fixedCosts / contribution) when contribution positive.
- Days to break even = breakEvenUnits / salesVelocityPerDay when velocity >0.
- If contribution negative, business never breaks even at this price.
Worked example
New Amazon private label SKU
$300 fixed monthly, $29.99 price, product $8, Amazon fees $8.50 (referral $4.50 + FBA $4), other variable $1.50 packaging and inbound, velocity 5 per day.
FAQ
Common questions
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