Firebase Firestore bills across 4 metered dimensions. The table below lists the current per-unit rates, verified June 14, 2026. What you actually pay depends on your usage volume, which is the number a scan computes for your specific app.
| Metered dimension | Price |
|---|---|
| Document reads | $0 / reads |
| Document writes | $0 / writes |
| Storage | $0 / GB-month |
| Network egress | $0 / GB |
Spark plan is free with daily no-cost limits. Blaze pay-as-you-go plan defers to Google Cloud pricing for per-unit costs beyond free tier. The Firebase pricing page no longer lists explicit per-unit prices for Firestore reads/writes/storage — those are now referenced via Google Cloud pricing links.
Source: firebase.google.com · Catalog 2026-06-14.2. Confirm the live rate before you commit.
The rates above are per unit. Your bill is those rates times how hard your code leans on Firebase Firestore, plus everything around it. PrePrice scans your project, finds where you call Firebase Firestore, and computes your real cost per user and what to charge.
Find your real cost — freeFirebase Firestore is billed per metered unit of usage. See the table above for each dimension and its rate, and the official pricing page for plan minimums and included allowances.
The per-unit rate is only one of the four numbers that set your bill. The others are how much your app uses Firebase Firestore, how often, and across how many users. Long prompts, retries, multi-step agents, and uncached repeated context all multiply the rate. PrePrice models that usage from your code so the number is real, not a guess.
From Firebase Firestore's official pricing page (firebase.google.com), verified June 14, 2026 and re-checked on a schedule. Pricing changes often, so confirm the live rate before you commit.
See the full AI Cost Index or estimate your monthly bill.