B2B Ad Spend ROI Calculator

A 3:1 ROAS (generating $3 for every $1 spent) is the minimum benchmark for profitability in most B2B scenarios. A 5:1 ratio or higher is considered excellent. However, ROAS alone doesn't tell the full story — a campaign with lower ROAS but higher deal sizes may still outperform one with great ROAS on small deals. Always evaluate ROAS alongside CAC, deal size, and customer lifetime value to get the complete picture.

Cost Per Lead (CPL) measures how efficiently your ads generate interest — it's a marketing efficiency metric. Customer Acquisition Cost (CAC) includes the full funnel from lead to closed deal, making it a business viability metric. You can have a great CPL but a terrible CAC if your qualification or conversion rates are low. The key diagnostic: if CPL is good but CAC is high, the problem is in your sales process, not your advertising. If both are high, you have a targeting or messaging problem at the top of funnel.

Your CAC should be no more than 1/3 of your Customer Lifetime Value (CLV). If you're spending $500 to acquire a customer worth $2,500, that's a 20% ratio — healthy. If CAC exceeds 50% of CLV, you're likely losing money after accounting for delivery costs, overhead, and churn. The insights panel in this calculator flags your ratio automatically and tells you whether you're in a healthy, acceptable, or concerning range.

A low click-to-lead rate (below 2-3%) usually signals a disconnect between your ad and your landing page. Common causes: the landing page doesn't match the promise in the ad, the form is too long or asks for too much information upfront, page load speed is slow (especially on mobile), or your offer isn't compelling enough to justify the lead exchange. Test one variable at a time — start with simplifying your form, then check message match, then optimize page speed.

The scenario sliders let you model "what if" situations before committing budget. Try these exercises: 1) Double your ad spend while keeping conversion rate flat — does the resulting CAC still make sense? 2) Increase conversion rate by 5 points — how much does that shift your ROI? 3) Find the break-even point where ROI hits 0%. These exercises help you build a business case for budget requests and identify which lever (spend, conversion, deal size) has the biggest impact on your return.

For B2B, a 30-50% lead qualification rate is typical. Below 30% usually means your targeting is too broad — you're attracting people who don't match your ICP. Above 50% is excellent and suggests strong targeting alignment. If your qualification rate is low, the fix is almost always upstream: refine your ad audience, tighten your keyword targeting, or add qualifying questions to your lead form so only serious prospects submit.

The comparison table becomes most useful with 2-5 campaigns that share a common variable. For example: same offer across different channels (Google vs. LinkedIn vs. Facebook), same channel across different time periods (Q1 vs Q2), or same audience with different messaging. The goal isn't just to find the "winner" — it's to understand why one campaign outperforms another so you can apply those learnings to future spend.