Calculate your Target Cost Per Acquisition for Google Ads campaigns. Enter your budget and conversion goals to find the exact CPA you need to hit.
Enter your monthly budget and conversion targets to calculate your Target CPA.
Tandem Martech connects to your Google Ads account and identifies exactly which keywords are above or below your Target CPA — with specific recommendations to fix them.
Target CPA (Cost Per Acquisition) is the average amount you want to pay for each conversion — whether that's a lead form submission, phone call, purchase, or any other action you've defined as a conversion in Google Ads.
It's one of the most important numbers in any Google Ads account. Set it too high and you're overpaying for conversions. Set it too low and Google's algorithm won't be able to spend your budget or find enough conversions to hit the target, which can cause your campaigns to underperform or go inactive.
Target CPA is also Google's automated bidding strategy name — when you use "Target CPA" bidding, you tell Google what you want to pay per conversion and it adjusts bids automatically in every auction to try to hit that average.
The Target CPA formula is straightforward:
For example: if your monthly budget is $5,000 and you want 50 leads per month, your Target CPA is $100.
To understand what CPA means for your clicks and keywords, expand the formula:
If your landing page converts at 3.5% and your Target CPA is $100, you need to keep your average CPC under $3.50 to hit that target. If you're paying $6 CPC on average, you'll need a conversion rate above 6% to stay on target — or you need to accept a higher CPA.
What counts as a "good" CPA varies enormously by industry, service value, and business model. Here are typical ranges for common industries running Google Ads:
These are rough benchmarks — your actual Target CPA should be based on your unit economics: what a customer is worth to your business, not what the industry average is.
Work backwards from what a customer is worth. If your average client pays $3,000 and you have a 30% gross margin, each client is worth $900 to your business. Paying $150 per lead with a 10% lead-to-client conversion rate means you're paying $1,500 per client — 67% above what it's worth. Your real Target CPA would be $90 or lower.
If your account has conversion history, your average historical CPA is the best starting point for your Target CPA — not an arbitrary goal. Set your target at or slightly below your current average to put pressure on efficiency without cutting off traffic completely.
When setting up Target CPA bidding for the first time, set it 20-30% higher than your ideal target. Google needs at least 30-50 conversions per month to optimize effectively. Starting too aggressive causes the algorithm to go into a low-spend "learning" state and miss opportunities.
Once the algorithm is performing, reduce your Target CPA by 10-15% at a time, waiting 2-3 weeks between adjustments to let performance stabilize before making the next change.
Use Target CPA when you have a fixed conversion action with consistent value — a lead form, a phone call, a consultation booking. Every conversion is worth roughly the same to your business.
Use Target ROAS when your conversion values vary — e-commerce with different product prices, for example, where a $500 sale and a $50 sale should be weighted differently in bidding.
For most lead generation accounts — medical, legal, home services, B2B — Target CPA is the right choice. For e-commerce or accounts with variable conversion values, Target ROAS gives the algorithm better signal.