Break-even ROAS calculator. Margin-aware target.
Enter contribution margin %. Get the minimum break-even ROAS plus LTV-aware target ROAS that includes second-order revenue. Tells you the actual floor below which paid spend loses money.
Margin drives the floor.
3 ROAS thresholds.
Margin sets the floor.
Break-even ROAS is 1 divided by contribution margin. A brand with 40% contribution margin needs ROAS of 2.5 to break even on ad cost; below that, every dollar spent loses money. Many founders run paid acquisition tracking ROAS without margin adjustment and report "profitable" campaigns that are actually contribution-negative. The calculator above forces the margin into the calculation so the floor is honest, plus the refund-adjusted floor (subtracts returned revenue), the operating target (1.4x break-even for healthy buffer), and the LTV-aware target (divides break-even by repeat-purchase frequency).
Three principles for ROAS discipline. One, never report ROAS without contribution margin in the same row — ROAS without margin is theater. Two, separate first-purchase ROAS from LTV-aware ROAS — subscription brands run profitable sub-1.5 first-purchase ROAS because LTV is 3x first-purchase; one-time-purchase categories must hit profitability on day one. Three, refund rate compresses ROAS more than founders model — an 8% refund rate on a 40% margin business pushes break-even from 2.5 to 2.72; many DTC categories run 12-25% returns and the math is brutal. The fix is product-side, not creative-side.
Tools in the same cluster: ROAS Calculator for the spend-and-revenue picture. Blended CAC Calculator for the customer-cost view. LTV Calculator for the lifetime-revenue view that justifies sub-breakeven first-purchase ROAS.
Six answers.
What is break-even ROAS?
Break-even ROAS equals 1 divided by contribution margin (expressed as a decimal). A 40% contribution margin yields a 2.5 break-even ROAS — every $1 of ad spend must return $2.50 in revenue to break even on the ad cost. The metric strips ad spend down to its bare-margin minimum: at any ROAS below this floor, every dollar spent loses money. Above this floor, every dollar spent earns money. Real-world target ROAS sits 30-50% above break-even to absorb refunds, returns, and overhead.
Why isn't a 1.0 ROAS break-even?
ROAS of 1.0 means every $1 spent returned $1 in revenue — but that revenue includes COGS, shipping, payment fees, and refunds before you see margin. A 1.0 ROAS on a 40% contribution margin actually loses 60 cents per dollar spent. Many founders track ROAS without the margin adjustment and report 'profitable' campaigns that are actually destroying contribution dollars. The calculator above forces the margin into the calculation so the floor is honest.
What's a healthy ROAS by category?
Healthy target ROAS (not break-even, but the operating target) by category: DTC mass-market (30-40% margin) targets 3.5-5.0. DTC premium (50-60% margin) targets 2.0-2.8. Beauty + supplements (60-70% margin) targets 1.8-2.5. Fashion (40-55% margin) targets 2.5-3.5. Home + furniture (40-50% margin) targets 2.5-3.2. SaaS subscription (high margin but long payback) targets blended-CAC-aware metrics, not first-purchase ROAS. The calculator above shows your category's break-even and the typical 1.4x operating multiple above it.
Should I use first-purchase ROAS or LTV-aware ROAS?
Both. First-purchase ROAS (called blended ROAS or campaign ROAS) tells you whether the campaign is buying customers profitably day-one. LTV-aware ROAS includes the expected repeat-purchase revenue and tells you whether the customer is profitable across their lifetime. DTC brands with strong subscription or repeat-purchase mechanics often run sub-1.5 first-purchase ROAS profitably because LTV is 3x first-purchase value. Pure one-time-purchase categories (durable goods) must hit profitability on first purchase.
What lifts ROAS without changing creative?
Three margin-side levers. One, raise prices — even 5% price lifts add 5pp to contribution margin, dropping break-even ROAS proportionally. Two, reduce shipping cost (negotiate carrier rates, charge for shipping under threshold). Three, reduce COGS (renegotiate suppliers, change packaging). Four creative-side levers: tighten ICP (broad targeting wastes impressions), shorten purchase path (one-page checkout), retarget warm audiences (3-5x lower CPC than cold), use lookalikes from high-LTV cohorts only.
Does this tool save my data?
No. Every value lives in this browser tab only. Nothing is sent to any server. Closing the tab clears the data. The Copy Results button puts a plain-text summary on your clipboard.
ROAS below break-even?
Our paid acquisition engagements run a margin + ROAS audit, ship a 30-day creative + audience iteration cycle, and report contribution per acquisition alongside ROAS so the math stays honest.
Published .