Free business tool

Break-Even ROAS & Acquisition Profitability Calculator

See whether first-order contribution and expected repeat purchases can support your customer acquisition cost.

ROAS, MER and CAC answer different questions. This tool keeps them separate, shows the safe CAC ceiling under your assumptions, and treats future purchases as a scenario—not a forecast.

Your economics

All results update immediately.

Net AOVRevenue kept per order after discounts and refunds.Product + fulfillmentVariable product, pick, pack and delivery cost per order.Payment feesProcessor fees as a share of net AOV.Current CACAcquisition spend divided by newly acquired customers.Repeat customer rateShare expected to purchase again inside the selected horizon.Average repeat ordersAverage additional orders among customers who repeat inside the horizon.Desired customer profitContribution retained after CAC as a share of expected customer revenue.Payback horizonThe period covered by your repeat-rate and repeat-order assumptions.Total revenue (optional)Optional. Use the same period and channels as total marketing spend.Total marketing spend (optional)Optional. Enables blended MER when entered with total revenue.

Your acquisition position

Your CAC is $10.04 above the safe ceiling.

Safe ceiling$47.96

Scenario CAC$58.00

Acquisition metrics

CAC$58.00

First-order ROAS1.64×

Break-even ROAS1.89×

Blended MEREnter period totals

CAC payback1.16 orders

Your scenario produces enough expected contribution to cover CAC within the 90-day assumption window. This is not a calendar-time forecast.

Money flow

Net AOV$95.00

Contribution before CAC$50.15

First-order contribution after CAC−$7.85

Expected customer contribution before CAC$67.00

Desired customer profit$19.04

Expected profit after CAC$9.00

What needs to change

Maximum affordable CAC$47.96

AOV needed at current CAC$104.16

Repeat rate needed51.3%

First-order ROAS uses net AOV ÷ CAC. Break-even ROAS uses net AOV ÷ contribution before acquisition. MER requires revenue and marketing spend from the same period and channels. Fixed overhead, tax, and cash timing are excluded.