Reviewing a renewal? Use the free checklist online alongside your invoice without signing up. The working templates use a $0 checkout with your email, country and ZIP/postal code.
What this page does not cover: A quality ranking, every Microsoft bundle, or your negotiated contract. The worked example uses current add-on pricing and does not predict future usage.
Copilot versus ChatGPT cost at a glance
Billing period
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U.S. dollar prices reviewed October 28, 2026. Annual amounts are monthly equivalents of an annual commitment. Monthly rates use the monthly subscription offer. Calculations exclude taxes, additional usage and contract-specific adjustments.
| Option | Annual billing: per user/month | Billing terms | What else to budget |
|---|---|---|---|
| ChatGPT Business Standard | US$20 | Annual billing | Optional extra workspace credits; separate API usage |
| ChatGPT Business Premium | US$100 | Annual billing | Higher allowance; same extra-cost checks |
| Copilot Business add-on | US$21 list; eligible offer US$18 | Annual commitment; promotion eligibility applies | Qualifying base license; metered advanced AI |
| Microsoft 365 Business Standard with Copilot, with Teams | US$23.50 | Annual commitment | Bundle includes base suite; advanced AI can be extra |
| Microsoft 365 Business Premium with Copilot, with Teams | US$32 | Annual commitment | Different base security suite; advanced AI can be extra |
Source checked October 27, 2026: OpenAI, Managing billing and seats in ChatGPT Business.
Source checked October 28, 2026: Microsoft, Copilot plans and pricing for business.
The advertised US$18 Copilot add-on offer runs July 1 to December 31, 2026 for eligible existing business customers, requires an annual commitment and applies to the first year. Confirm eligibility and renewal pricing; do not carry the promotional rate into every future year.
Source checked October 28, 2026: Microsoft, Copilot business pricing, offer terms.
Compare the license you need and the work it covers
The current Copilot Business add-on requires an eligible base license, such as Microsoft 365 Business Basic, Standard, Premium or Apps for Business; the current eligibility list also includes Teams Essentials. It supports up to 300 licensed users per tenant. Check app entitlements as well as Copilot eligibility, because not every base plan contains desktop apps or Teams.
Source checked October 28, 2026: Microsoft, License options for Microsoft Copilot.
Microsoft's published CSP Copilot Business offer permits one to 300 seats; confirm the applicable offer on your quote. ChatGPT Business requires two paid seats; new workspaces have a 200-seat maximum, with an exception for workspaces created before August 24, 2026.
Source checked October 27, 2026: Microsoft, July 2026 Partner Center announcements, Copilot Business offer.
Source checked October 27, 2026: OpenAI, ChatGPT Business: General FAQ.
Choose a small set of real tasks and judge both options on the evidence: usable output, access to approved information, review effort and the applications people actually use. A seat-price comparison cannot establish that either product is better for your work.
Illustrative example: 25 staff, ten paid AI users
Annual billing. The toggle changes both base-suite and AI-seat billing in this example; the price table follows the same billing selection.
Assume a hypothetical firm keeps 25 Microsoft 365 Business Standard licenses with Teams at US$14 per user monthly equivalent, under annual commitment: 25 x US$14 x 12 = US$4,200 per year. It wants ten paid AI seats. All figures hold the seat counts and current prices constant for a year.
Source checked October 28, 2026: Microsoft, Microsoft 365 Business Standard pricing.
| Scenario | AI subscription calculation | Base suite plus AI |
|---|---|---|
| Ten ChatGPT Standard seats | 10 x US$20 x 12 = US$2,400 | US$4,200 base + US$2,400 AI = US$6,600/year |
| Ten Copilot add-ons at list price | 10 x US$21 x 12 = US$2,520 | US$4,200 base + US$2,520 AI = US$6,720/year |
| Ten eligible Copilot promotional add-ons | 10 x US$18 x 12 = US$2,160 | US$4,200 base + US$2,160 AI = US$6,360 for the promotional first year |
The US$120 annual list-price difference does not establish a winner. Request the bundle quote too: a bundle replaces the relevant base license, so adding its entire price on top of the existing base price would double count that suite. Conversely, an existing unexpired commitment can create overlapping charges during a switch.
Neither seat estimate is an automatic bill ceiling
Microsoft separates included Copilot capabilities from metered advanced experiences. Review the enabled services, billing relationship and spending policy with the administrator.
Source checked October 28, 2026: Microsoft, Usage-based billing and cost management for Copilot Credits.
OpenAI separates Business seats, workspace credits and API billing. Review those accounts independently; API usage is not included in a Business seat.
Source checked October 27, 2026: OpenAI, Managing billing for ChatGPT and the API platform.
Microsoft has announced default usage-based billing, with an adjustable 4,000-credit monthly limit per user, for qualifying new Copilot Business CSP purchases in supported markets from December 1, 2026. It is still a future change on this review date. Check the Copilot December 1 billing guide for scope, then confirm the actual policy with your provider.
Also announced for December 1: new Copilot offers will remove the qualifying base-subscription purchase prerequisite. Available experiences will still depend on licensed Microsoft apps and services. This comparison uses the current add-on offers; recheck the order when the new offers become available.
Source checked October 28, 2026: Microsoft, October 2026 Partner Center announcements.
How to check the two subscription totals
- Record the paid users and exact Standard, Premium, add-on or bundle offer on each quote.
- Identify existing base licenses and replacement bundles so that the same suite is counted once.
- Separate annual commitments, monthly subscriptions, temporary promotions and later renewal prices.
- Check workspace credits, API charges and Microsoft spending policies separately. Save the approved scope and next review date.
Questions before choosing a subscription
Is Copilot Chat already available without a paid Copilot add-on?
It is included with eligible Microsoft 365 plans, with different scope from the paid offer. Check existing access before purchasing for a task it may already cover.
Source checked October 28, 2026: Microsoft, Copilot plans and pricing for business.
Do we need to license all 25 staff in the example?
No automatic conclusion follows from headcount. Identify the users needing paid capabilities, check the relevant minimum and license terms, and keep the purchasing scope explicit.
Is paying monthly the same as a monthly contract?
Not necessarily. An annual commitment may allow installments. The table separates advertised monthly subscriptions from annual prices; confirm both the term and payment frequency on your actual quote.
Can we keep both tools?
Yes, if the approved work justifies both commitments. Assign each a clear purpose and owner, then review the overlap with actual usage and output evidence.
Turn the price into a review decision
For a U.S. professional-service firm with 10 to 250 people, start with one invoice and one upcoming renewal. Use the free AI Renewal Checklist to work through the review, with no signup. Keep the evidence and decision in your own records or the free review templates.
Read AI seat versus usage pricing to separate fixed commitments from variable charges. Compare AI subscription review options if you are choosing a spreadsheet, AccruePilot or connected software. For the OpenAI side in more detail, read ChatGPT cost for business.
The AccruePilot AI Spend Control System is US$59 once for a local browser Control Center, editable Excel workbook and 12-page field guide. You supply and maintain the records. It does not discover accounts, enforce vendor budgets or cancel subscriptions.
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Published by AccruePilot, which sells the manual toolkit described here. Vendor names identify the services reviewed and do not imply endorsement.