Grammarly Cost: Startup & Ongoing Costs

Grammarly is a writing assistant that checks spelling, grammar, tone and clarity in the browser, desktop apps and mobile keyboards. It has three plans: Free, Pro and Enterprise. Only Pro has a public price, and that price changes a lot depending on how often you pay.

The annual Pro price comes from Grammarly, checked on Oct 13, 2026. The monthly and quarterly prices come from independent write-ups that report them, listed below. Because Grammarly adjusts plans and promotions, confirm the number on its official plans page before you pay.

On annual billing, Pro is $12/mo. Pay month to month and the same plan costs more per month. The table below shows the difference.

Billed monthly, Pro is $30/mo, as reported by Layer3 Labs. Billed quarterly it works out to $20/mo, according to DailyFix. Compared with the annual rate, monthly billing costs two and a half times as much per month for identical features, so the billing period matters more than most people expect.

A year of Pro on annual billing comes to $144/yr, according to CostBench. If you pay monthly instead, a full year would cost noticeably more than that, since the monthly rate is higher. Stay on monthly billing only when you need the tool for a short stretch, such as a single semester or a one-off project.

Grammarly Free covers the basics: writing without spelling and grammar mistakes, plus seeing the tone of your writing. It also includes a limited number of AI prompts each month. For many people who write short messages and emails, that is enough.

According to Grammarly's plans page, Pro includes everything in Free and adds:

• Full-sentence rewrites with a click
• Tone adjustment
• Fluent English suggestions
• Unlimited personalized suggestions
• Plagiarism detection and detection of AI-generated text
• A much larger monthly allowance of AI prompts than the Free plan

Grammarly's FAQ describes Pro as carrying writing features from the older Premium plan along with team features that used to be limited to the Business plan. If you see older articles that list separate Premium or Business prices, they may be out of date.

Pro is offered to eligible individuals and teams. Organizations that need more control move to Enterprise. Its listed extras include dedicated support, custom roles and permissions, data loss prevention, encryption key management and cost center visibility. Enterprise has no published price, and the plans page directs buyers to contact sales for a quote.

That depends on how much you write and how much the extra checks save you. A few situations where people tend to pay:

• Long documents such as reports, theses or proposals where sentence rewrites and tone control save editing time
• Work where a plagiarism or AI-text check matters before you submit
• Writing in English as a second language, where fluency suggestions help

If you only need spell-check and basic grammar, try the Free plan first and upgrade only when you hit its limits.

• Choose annual billing if you are confident you will use Grammarly for the year, since it has the lowest per-month price.
• Start on Free and upgrade later, so you only pay once you know which Pro features you use.
• Watch for promotions on the official site, but check what the price becomes at renewal.
• Check whether your employer or school already provides an account before buying your own.

Taxes may be added depending on your location. Auto-renewal is common with subscription software, so read the renewal terms and set a calendar reminder if you only want a single period. The plans page also lists a free trial for Pro, so look at its terms before you add a payment method.