Google Apps Script Quotas & Limits: Complete 2026 Reference

Google Apps Script enforces published daily quotas and hard per-run limits. Consumer accounts (@gmail.com) get lower caps than Google Workspace accounts, so a script that works on a personal test account can fail under a Workspace production user — or the reverse if you load-test on Workspace and ship to Gmail.

Official numbers (Google's Quotas for Google Services docs): UrlFetch is 20,000 calls/day on consumer vs 100,000/day on Workspace; email recipients are 100/day vs 1,500/day (2,000/day within-domain on Workspace); trigger total runtime is 90 minutes/day vs 6 hours/day. Quotas are per user and reset 24 hours after the first request in the period — not at a fixed Pacific midnight.

When a script throws "Service invoked too many times" or "Exceeded maximum execution time," fix the architecture: smaller batches, fewer polls, caching, and continuation triggers. For execution timeouts, see /blog/google-apps-script-execution-time-limit; for trigger failures, see /blog/google-apps-script-trigger-not-working-fix. Source: https://developers.google.com/apps-script/guides/services/quotas.

Example code

function checkEmailQuotaAndFetch() {
  const remaining = MailApp.getRemainingDailyQuota();
  Logger.log('Email recipients remaining today: ' + remaining);
  if (remaining < 10) {
    throw new Error('Email quota nearly exhausted (' + remaining + ' left)');
  }

  const props = PropertiesService.getScriptProperties();
  const count = parseInt(props.getProperty('urlFetchCount') || '0', 10) + 1;
  props.setProperty('urlFetchCount', String(count));

  const res = UrlFetchApp.fetch('https://httpbin.org/get', { muteHttpExceptions: true });
  if (res.getResponseCode() === 429) {
    throw new Error('External API rate limit — backoff required');
  }
  return res.getContentText();
}

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