Quick Answer: Grammarly Premium costs $144/year and delivers measurable writing improvements for professionals who write frequently. It's worth it if you write more than 5,000 words monthly and value error reduction over 90% accuracy. For casual writers or those on tight budgets, the free version covers basic grammar; for power users, Premium's advanced features (tone detection, plagiarism checking, citation generation) justify the cost. Through Vest's cashback program, you can reduce your effective cost significantly.
TL;DR
- Grammarly Premium costs $144/year ($12/month billed annually) and catches 90%+ of grammar, spelling, and tone issues
- Free version covers basic grammar; Premium adds tone detection, plagiarism checking, and citation generation
- Average professional writer saves 3–5 hours/month on editing with Premium enabled
- Vest members earn cashback on Grammarly subscriptions, lowering your net cost
What Is Grammarly Premium?
Definition: Grammarly Premium is a paid writing assistant subscription that uses AI to detect and correct grammar, spelling, punctuation, tone, and plagiarism across email, documents, and web applications.
Grammarly Premium is the paid tier of Grammarly's writing platform. The free version catches basic errors; Premium adds advanced features like tone detection, plagiarism checking, citation generation, and personalized writing goals.
The tool integrates into your browser, Microsoft Office, Google Docs, and email clients. It works across 500,000+ websites and applications, meaning you get real-time corrections whether you're drafting an email, writing a LinkedIn post, or editing a proposal.
Core Premium features:
- Advanced tone detection (detects 100+ tone variations)
- Plagiarism detection (checks against 16 billion web pages)
- Citation generation (APA, MLA, Chicago formats)
- Personalized writing goals (clarity, engagement, formality)
- Full synonym suggestions and vocabulary enhancement
- Priority support
Grammarly Premium vs. Free: The Real Difference
The free version handles 90% of what most casual writers need. Premium is built for professionals who write frequently and need confidence that their work is polished before it reaches an audience.
| Feature | Free | Premium |
|---|---|---|
| Grammar & spelling | ✓ | ✓ |
| Punctuation | ✓ | ✓ |
| Tone detection | ✗ | ✓ (100+ tones) |
| Plag |