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How much should you really spend on advertising?

Smart budgets beat big budgets. Use the right model, set clear guardrails, then scale what works. This playbook shows how to go from a test budget to confident, profitable spend.

8‑minute read Updated Sep 2025

Why budgeting matters

Budget is a strategy, not a spreadsheet. The right envelope accelerates learnings, reduces CAC over time, and keeps your team focused on outcomes—not vanity metrics.

1) Choose a budgeting model

A. Top‑down (% of revenue)

  • New brands: 8–12% of projected revenue.
  • Growing brands: 5–8% to sustain momentum.
  • Mature/efficient: 3–5% with strong brand equity.

Simple and fast. Revisit quarterly as revenue and payback evolve.

B. Bottom‑up (CAC & payback)

  • Target CAC ≤ Gross margin × LTV/Payback
  • Define acceptable payback window (e.g., ≤ 3–6 months).
  • Back into monthly budget from target volume × CAC.

More precise. Needs reliable tracking and margin clarity.

C. Funnel allocation (rule of thumb)

  • Prospecting: 60–70% (new reach & testing)
  • Retargeting: 20–30% (site & video engagers)
  • Brand/Defensive: 5–10% (search brand, competitors)

Shift weight as creative efficiency and demand evolve.

2) Set guardrails

  • Daily cap: avoid burning learnings in a single day.
  • Max CAC & min ROAS: define stop‑loss rules per campaign.
  • Frequency caps: limit fatigue on retargeting pools.

3) Inputs & assumptions

  • Baseline metrics: CPM, CPC, CTR, CVR, AOV/ARPU, margin.
  • Attribution: use server‑side events/Conversions API; keep UTMs and naming consistent.
  • Landing readiness: speed, clarity, and message match with ads.

4) Build your month‑1 plan

  • Start with 3–5 creative angles; 2–3 variants each.
  • Structure: Prospecting (broad/interest) · Retargeting (site/video) · Brand/Promo.
  • Name & tag everything; set learning budgets you can keep for 7–14 days.

5) Launch checklist

  • Pixel/CAPI verified · events mapped (view, add, lead, purchase).
  • Tracking sanity test with a small spend before full rollout.
  • Landing pages pass speed and clarity checks.

6) Optimization cadence

  • Daily: outliers only (budget leaks, broken tracking).
  • Twice weekly: creative pruning, angle/offer tests.
  • Weekly: re‑allocate budget by CAC/ROAS and watch‑time/hold metrics.
  • Monthly: revisit the model, scaling winners 10–20% at a time.

7) 30/60/90 scaling plan

  • Days 0–30: prove the angle → offer → page chain; reach first stable CAC.
  • Days 31–60: scale winners, launch net‑new angles, add mid‑funnel content.
  • Days 61–90: expand geos/placements; refresh top creatives; tighten retargeting frequency.

Troubleshooting

  • High spend, few conversions: mis‑match between ad promise and landing; fix first fold and offer clarity.
  • Good CTR, poor CVR: test pricing/bonus, reduce form friction, improve social proof.
  • Fatigue & rising CPM: rotate hooks, refresh first 3 seconds, widen audiences slightly.

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