How Long Should a SaaS Free Trial Be? The Trial Length Rule

A SaaS free trial should run about twice your median time to first value, plus a few days for one sales touch: 7 days if users get value the same day, 14 days if it takes 1 to 3 days, and 21 to 30 days if setup needs a data import or team invites. Fourteen days is the most common length, used by 62% of products in ChartMogul’s 2026 study of 200 B2B software products.

Rules of thumb

• If your median user reaches first value in under a day, 7 days is enough: 2 x 1 day plus a 5-day touch window is 7.
• If first value takes 1 to 3 days, 14 days fits: 2 x 3 days plus 5 to 7 days for a touch is 11 to 13, rounded up to 14.
• Fourteen days is the norm, not the rule: 62% of products use it, 14% use 7 days and 14% use 30 days (ChartMogul, 2026).
• Trial type moves conversion more than trial length: card-required trials converted at 30%, more than five times no-card trials, in the same ChartMogul report.
• Longer trials mainly add sign-ups and late payers: a 3-day to 7-day change lifted adoption and delayed conversion but not immediate conversion in a 680,588-user field experiment.
• If your trial is more than three times your median activation time plus a week, it runs a full activation period past what the Trial Length Rule allows and removes urgency for no gain.

The Trial Length Rule: days = 2 x activation time + one sales touch

The Trial Length Rule sets a SaaS free trial at twice the median days from sign-up to activation event, plus one sales touch window, rounded up to 7, 14, 21 or 30 days.

Each part of the formula does a specific job:

• Median days to activation. The activation event is the first action that predicts payment: a report generated, a first campaign sent, a teammate invited, data imported.
• Times two. Half your trial users are slower than the median. Doubling the median gives most of the slower half time to activate before the clock runs out. The multiplier is an assumption, not a published benchmark: test it against your own day-by-day conversion curve.
• Plus one sales touch window. Most trials are not purely self-serve: ChartMogul found 80% of free-trial products add human touchpoints when an enterprise user enters the trial. A touch needs time after activation for a call, a reply and a decision. We assume 3 to 7 days; replace it with your own reply-to-decision time.
• Round up to a standard length. Rounding up rather than down protects the slower half of users.

FAQ: SaaS free trial length

Is a 14-day or 30-day free trial better for B2B SaaS?

A 14-day trial suits B2B products whose users reach first value within about three days; a 30-day trial suits products that need a data import, integrations or several colleagues before they show value. In ChartMogul’s 2026 conversion report, 62% of products ran 14 days and 14% ran 30 days, so 30 days is a deliberate choice, not a default.

Does a longer free trial increase conversions?

A longer free trial often raises sign-ups and late conversions rather than immediate ones. In a randomised field experiment of 680,588 users published in Frontiers in Psychology (2025), moving from a 3-day to a 7-day trial significantly lifted trial adoption and delayed conversion, but the effect on immediate conversion was not statistically significant.

Should a SaaS free trial require a credit card?

A credit-card-required trial converts a far higher share of sign-ups but attracts fewer of them. ChartMogul’s 2026 report found card-required trials converting at 30%, more than five times trials without a card, and 20% of free-trial products in its sample asked for a card upfront. Compare paid accounts per 1,000 visitors, not conversion rate alone.

What if I do not know my time to first value yet?

Start at 14 days, the length most products use, and log the date each trial account first completes your activation event. After 100 to 200 trials, take the median days to that event, apply the Trial Length Rule, and change the length only if the result lands in a different band.

When should a SaaS skip the free trial and lead with a demo?

A SaaS product should lead with a demo when the buyer needs security review, legal sign-off or a purchase order before anyone can use it, because no trial clock survives that. Our trial-or-demo decision matrix scores that choice in detail.

SaaS free trial length by time to first value

SaaS free trial length should step up in four bands as time to first value grows, and a procurement-led sale should drop the trial for a demo.

Only the 14-day share of the market (62% of products) comes from published data; every band above is a labelled assumption built from the formula. If your median activation runs past about 11 days, a 30-day trial can no longer cover the slower half of users, which is a sign the product needs assisted onboarding or a demo-led motion. How long buying committees take is covered on our page about how long SaaS procurement takes.

Worked example: how long should my SaaS free trial be?

A SaaS product whose median trial user activates on day 4 needs a 14-day or 21-day trial, depending on how fast its sales team turns a reply into a decision.

Take two hypothetical products. The inputs are illustrative assumptions; substitute your own.

Product B would cut most users off before value on a 14-day trial: 14 days covers barely more than the median user’s 9-day setup, leaving little room for slower accounts or a sales conversation. Product A sits in the table’s 4-to-7-day band: with that band’s 7-day touch window it calculates to 15 days and runs as a 21-day trial, so the speed of your sales touch decides between 14 and 21. The touch-timing row is where the rule meets the sales process; our page on when to call SaaS trial sign-ups covers which signals justify a call.

What the published data says about SaaS trial length

SaaS trial length has a weaker effect on conversion than most founders expect, according to three published datasets on the question.

• ChartMogul, 2026. Kyle Poyar’s Conversion Report for ChartMogul and ProductLed covered 200 B2B software products surveyed in January 2026. The most common trial length was 14 days (62%), then 7 days (14%) and 30 days (14%). The median free-to-paid conversion rate across all products was 8%, with a 10x gap between the top and bottom fifth.
• Frontiers in Psychology, 2025. Zhang and Duan’s randomised field experiment at a global image-editing SaaS company assigned 680,588 new users in 190 countries to a 3-day or a 7-day trial. The 7-day group adopted the trial more often and converted more often later, but the effect on immediate conversion was not statistically significant. The trials were short and sat on a freemium product.
• MadKudu via Tomasz Tunguz. In 2018, Tunguz reported MadKudu’s analysis of nine companies: in all but three, half of the customers who eventually paid had converted by day 14, and in all but one, half had converted within 30 days. Nine companies is a small sample.

Read together, the data supports one practical conclusion: length should be matched to activation time, then left alone while you work on activation itself, which our guide to increasing SaaS trial activation covers.

How to measure your median days to activation

Median days to activation is measured from each trial account’s sign-up timestamp to the timestamp of its first activation event, across one or two recent monthly cohorts.

1. Pick one activation event that separates paying from non-paying trials. If unsure, take the first-week action with the widest gap between paying and non-paying accounts.
2. Export sign-up date and first activation date for every trial in the last 60 to 90 days.
3. Take the median of the gap in days. A spreadsheet MEDIAN() is enough.
4. Plot conversions by trial day. If most payments land well before the trial ends, the trial may be too long; if a spike lands on the final day, users are paying under deadline pressure, which is fine, unless many activate after the trial has already expired.
5. Apply the rule, change the length for new cohorts only, and compare paid accounts per 1,000 sign-ups at 60 days.

Signs your SaaS free trial is the wrong length

A SaaS free trial is the wrong length when activation and payment dates cluster far from the trial end date, in either direction.

The most common fix is not a new length at all but a shorter path to the activation event, because every day removed from setup also shortens the trial the rule recommends.

What running trial-length tests yourself costs

Running a trial-length change yourself costs a few hours of analysis plus one to two months of waiting for cohorts to mature, because conversion keeps arriving after the trial ends.

The analysis takes someone with product-event access about half a day. The test needs enough sign-ups per cohort to see a difference, and patience: ChartMogul counts conversion over six months, and the Frontiers study found much of the effect of a longer trial arrived as delayed conversion.

The sales touch window is the part that often goes unstaffed. If no one calls activated trial users inside that window, the extra days in the formula buy nothing. Teams without the headcount can automate or outsource that conversation; our SaaS lead generation page and the AI appointment setting service describe one way to staff it.

Sources

1. ChartMogul, Kyle Poyar: The SaaS Conversion Report, benchmarks for trials, freemium and conversion in 2026 (published 4 February 2026)
2. Zhang L, Duan J. Longer or shorter? A large-scale randomized field experiment on the impact of free trial duration. Frontiers in Psychology, 2025
3. Tomasz Tunguz: How long should a free trial be? (citing MadKudu)