Ad Spend Calculator
How much should you spend on Meta ads?
Set your monthly revenue goal. Bach works the budget backwards from the ROAS you assume — and shows the month-by-month timeline to get there with consistent spend.
Free · no sign-up · estimates, not benchmarks
Your plan
2.8× is a commonly quoted median with no named study behind it. Have history? Use your own trailing ROAS. See the benchmarks.
Sets your break-even ROAS (1 ÷ margin) — the line your ads must clear before they make money.
Your plan · estimated
Required ad budget
$17,857/mo
Goal reached
Month 4
Break-even ROAS 1.67× at a 60% margin — your 2.8× clears it.
Monthly revenue vs goal · modelled ramp
Modelled monthly revenue: 60% of goal in month 1, 80% in month 2, 95% in month 3, then 100% of goal from month 4 onward.
- Total spend
- $107,143
- Total revenue
- $267,500
- Blended ROAS
- 2.50×
- Est. gross profit
- $53,357
Blended ROAS sits below your 2.8× steady-state on purpose — months 1–3 run at 60–95% of full performance while the account ramps.
A waste range of 20–40% is often quoted (an unsourced estimate): $3,571–$7,143/mo on this budget, lost to fatigue, starved ad sets and broken tracking.
Protect this budget — start your free auditPlanning estimates from unsourced defaults — not a guarantee. Your numbers come from your connected account.
Want to see these numbers for your real account?
The calculator uses unsourced defaults. Connect your account and Bach audits your actual data — free on the 7-day trial.
The assumptions behind these numbers
- Budget math: required monthly budget = revenue goal ÷ expected ROAS, at steady state — the standard industry formula.
- Ramp model (modelled planning assumption): ~60% of steady-state performance in month 1, ~80% in month 2, ~95% in month 3, 100% from month 4. Meta says an ad set usually exits learning after about 50 results in the week after its last significant edit (Meta Business Help Center, checked 1 Oct 2026), but new or restructured accounts usually need creative testing and audience iteration before reaching steady state; that is what this conservative ramp models. It is also why blended ROAS over the horizon reads below your steady-state ROAS. Real ramps vary by account. Check whether each ad set can get there with the learning phase calculator.
- Break-even ROAS: 1 ÷ gross margin. At a 60% margin you need 1.67× just to cover product costs. Estimated gross profit = revenue × margin − ad spend; it ignores shipping, payment fees and overheads.
- ROAS default: 2.8× is a commonly quoted e-commerce median and 20–40% a commonly quoted waste range; no named study backs either, so treat both as placeholders. The benchmarks page explains how to build your own baseline.
- Currency: the INR view converts at ₹83 ≈ $1 for display only; it does not affect the math.
FAQ
Budget planning, answered.
How much should I spend on Meta ads?
Work backwards from your revenue goal: monthly ad budget ≈ revenue goal ÷ expected ROAS. At 2.8× — a median e-commerce ROAS you will often see quoted, though no named study backs it — a $50,000/month revenue goal needs about $17,900/month in ad spend. A higher ROAS needs proportionally less. The calculator on this page does this math for any goal, ROAS and timeline.
How long until Meta ads reach full performance?
Meta says an ad set usually exits the learning phase after about 50 results in the week after its last significant edit. Full account performance usually takes longer: creative testing and audience iteration mean months one and two typically run below steady state. A reasonable planning model is ~60% of expected performance in month 1, ~80% in month 2, ~95% in month 3 and full performance from month 4 — with consistent spend. A significant edit restarts the clock: a change to targeting, creative or optimization event, a new ad, a new bid strategy, or a pause of 7 days or longer. A budget change counts only when it is large, such as $100 to $1,000.
What is break-even ROAS?
Break-even ROAS = 1 ÷ gross margin. At a 60% gross margin you need 1.67× just to cover product costs — anything above that is gross profit, anything below loses money even while revenue grows. Set your margin in the calculator and it checks your expected ROAS against your break-even automatically.
What ROAS should I assume for planning?
There is no reliable universal median: 2.8× is often quoted, but no named study backs it, so treat it as a placeholder. If you have account history, use your own trailing 90-day ROAS instead of a benchmark — it is the single best predictor of your next quarter.
Is this calculator a guarantee of results?
No. It is a planning estimate built from an unsourced default ROAS and a modelled learning-phase ramp. Your real numbers depend on your product margins, creative, audience and account history. For figures from your own account history, plus labelled internal directional baselines, connect it to Bach for a free audit.
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