Paid AcquisitionvsMarketing Funnel

Paid acquisition is spending money on ads to acquire customers — Google Ads, Meta Ads, LinkedIn, TikTok, etc. The core equation is simple: if you spend $100 on ads and get 2 customers, your paid CAC is $50. The channel is scalable but has diminishing returns — the first $10K/month is often 3-5x more efficient than the next $100K/month because you exhaust the best-fit audiences first.

The marketing funnel maps the customer journey from first awareness to purchase. Each stage narrows — typically 100 visitors → 10 leads → 1 customer (a 1% visitor-to-customer rate). Understanding where people drop off is the fastest way to grow revenue without spending more on ads.

The fatal trap is scaling paid spend before knowing your unit economics. If your LTV is $200 and your paid CAC is $80 at $5K/month spend, you assume it'll stay at $80 when you 10x to $50K/month. In reality, paid CAC typically increases 30-60% as you scale because you move from high-intent searchers to broader, less-qualified audiences. Many startups burn through their runway scaling a channel that was only profitable at small budgets.

Most teams obsess over the top of funnel (more traffic!) while their middle-of-funnel conversion is 2%. Doubling your landing page conversion from 2% to 4% has the same effect as doubling your traffic — at zero additional cost. Always optimize the leakiest stage first.

Calculate your Paid CAC Payback Period: Paid CAC ÷ (Monthly ARPU × Gross Margin). If payback is under 6 months for B2B SaaS or under 3 months for B2C, you can scale confidently. Track ROAS (Return on Ad Spend) weekly: Revenue from paid customers ÷ Ad spend. Target a minimum 3:1 ROAS for sustainable growth.

Map your funnel with real numbers: Visitors → Signups → Activated → Paying. Calculate the conversion rate between each stage. The stage with the lowest conversion rate is your #1 priority. A healthy SaaS funnel converts 2-5% of visitors to signups and 20-40% of signups to paying.