What does a SaaS free-trial signup cost? Benchmarks and maths

A SaaS free-trial sign-up from paid search costs roughly US$56 to US$211 on labelled cost-per-click assumptions of US$4 to US$15, divided by First Page Sage’s 7.1% paid visitor-to-trial rate for no-card trials. No publisher reports cost per trial directly. The number only means something divided by trial-to-paid: at 17.4%, a US$113 trial is a US$648 paying customer. LeadsNow sees booked-call costs of $30–$400, depending on industry, offer, price and many other variables.

• The formula: cost per trial sign-up = cost per click ÷ visitor-to-trial rate. Cost per paying customer = cost per trial ÷ trial-to-paid rate.
• Visitor-to-trial, paid traffic: 7.1% for opt-in (no card) trials and 2.2% for opt-out (card required) trials, in First Page Sage’s data from 86 SaaS companies, Q1 2022 to Q3 2025.
• Trial-to-paid, paid traffic: 17.4% opt-in and 51% opt-out on the same First Page Sage data.
• A second view: the SaaS Conversion Report published by ChartMogul in 2026 (200 B2B software products) calls 4–6% free-to-paid “good” for free trials and reports 30% free-to-paid for free trials that require a card.
• The decision rule: the Trial Divisor, below.

What does a SaaS free-trial sign-up cost from paid traffic?

A SaaS free-trial sign-up from paid traffic costs about US$113 at a US$8 click and First Page Sage’s 7.1% opt-in rate, and about US$364 with a card required. The click costs are assumptions because cost per click varies too much by keyword and country for one benchmark to hold; put your own in.

The arithmetic, middle row: US$8 ÷ 0.071 = US$112.68 per opt-in trial, and US$8 ÷ 0.022 = US$363.64 per card-required trial. The First Page Sage rates are an agency’s aggregate of its own SaaS clients (71% B2B, 29% B2C), not a census, so read them as one dataset rather than the market.

The Trial Divisor: what a trial sign-up costs per paying customer

The Trial Divisor says cost per trial sign-up is only comparable after dividing it by trial-to-paid, because that division turns a trial price into the cost of a paying customer. The table uses the US$8 click from above and four published trial-to-paid rates, each on its own dataset and definition.

Why the two sources disagree: ChartMogul’s report defines free-to-paid as the share of leads or free sign-ups that become paying within six months, from a January 2026 survey, while First Page Sage notes that a conversion counts even a single paid month. Pick the definition that matches how you count, then use it consistently. The quotable version: a cheap trial with a low trial-to-paid rate is an expensive customer.

Rules of thumb

• If your trial-to-paid rate is 5%, every US$100 of cost per trial is US$2,000 of cost per paying customer.
• If you halve trial-to-paid at the same cost per trial, cost per paying customer doubles.
• If you add a card requirement at First Page Sage’s paid rates, expect cost per trial to rise about 3.2 times (7.1% to 2.2%) and cost per paying customer only about 1.1 times.
• If you charge US$100 a month at an 80% gross margin and want 12-month payback, keep cost per opt-in trial under about US$167 at 17.4% trial-to-paid.

How much can you afford to pay per trial sign-up?

The most a SaaS company can afford per trial sign-up is its acquisition cost ceiling times its trial-to-paid rate: about US$167 at US$100 a month and 17.4%. The ceiling here is monthly price × gross margin × payback months, with 80% margin and 12 months as labelled assumptions; the price bands follow ChartMogul’s typical respondent, at US$50 to US$249 per customer a month.

Read across a row before cutting ad spend. A US$50-a-month product converting at 5% cannot afford even the cheapest paid trial in the first table (US$56), so it needs organic sign-ups or a higher trial-to-paid rate before paid search makes sense.

Why is there no published cost-per-trial benchmark for SaaS?

No published cost-per-trial benchmark exists for SaaS because publishers report cost per lead, and a trial sign-up is a narrower event than a lead. First Page Sage’s 2026 cost-per-lead report puts B2B SaaS at US$318 paid, US$186 organic and US$249 blended, on data from January 2022 to August 2026. That is the nearest published number, but it measures leads as First Page Sage defines them, so it should not be quoted as a cost per trial. Building the number from cost per click and visitor-to-trial, as above, keeps each step on its own denominator.

What makes the cost per trial sign-up rise or fall?

Cost per trial sign-up moves with four inputs: the click price, the landing-page conversion rate, the card requirement and the share of junk sign-ups in the count.

• Channel. First Page Sage’s opt-in rate is 8.5% from organic traffic and 7.1% from paid, so the same page converts organic visitors better.
• Card requirement. It cuts visitor-to-trial from 7.1% to 2.2% on paid traffic and lifts trial-to-paid from 17.4% to 51%.
• Industry. First Page Sage’s visitor-to-trial rates run from 5.5% (enterprise) to 12.6% (IoT), so a cost per trial borrowed from another category is often wrong by half.
• The denominator. Duplicate, student and competitor sign-ups make cost per trial look cheaper and trial-to-paid look worse. Our page on why trial-to-paid conversion is low shows how to clean the count first.

How do you lower cost per paying customer without cutting trial spend?

The cheapest way to lower cost per paying customer is often to raise trial-to-paid on sign-ups you already paid for, because that divisor sits under all ad spend. Moving trial-to-paid from 17.4% to 20% at a US$113 trial cuts cost per paying customer from US$648 to about US$563. A common lever is a human or AI conversation with the sign-ups that show buying signals; when to call SaaS trial sign-ups sets the timing rule, and trial-to-paid conversion with outbound conversations covers the method. Doing it in-house means someone working the sign-up list every day within minutes of the signal, plus a dialler, an SMS tool and consent capture on the sign-up form. Teams without that capacity hand it to an AI appointment setting service; the rest of the SaaS funnel is in the SaaS lead generation guide.

FAQ: SaaS free-trial sign-up costs

These are the questions SaaS founders and growth leads ask most often when they price a free-trial sign-up.

What is the average cost per trial sign-up for SaaS?

No publisher reports one directly. Building it from a US$4 to US$15 click and First Page Sage’s 7.1% paid visitor-to-trial rate gives roughly US$56 to US$211 per opt-in trial.

What is a good trial-to-paid conversion rate?

The ChartMogul SaaS Conversion Report calls 4–6% good and 10–15% great for free-trial products overall, and 25–35% good when a card is required. First Page Sage reports 17.4% for opt-in trials from paid traffic, on a different definition.

Is cost per trial the same as cost per lead?

No. A lead can be any form fill; a trial sign-up is someone who created an account. First Page Sage’s US$318 paid B2B SaaS cost per lead is a lead figure.

Should I require a credit card to lower cost per paying customer?

Test it. On First Page Sage’s paid rates, a card raised cost per trial about 3.2 times but cost per paying customer only about 1.1 times, so the answer depends on your own rates.

How do I calculate cost per paying customer from cost per trial?

Divide cost per trial by trial-to-paid rate. A US$113 trial at 17.4% is US$648 per paying customer.