Dynamically adjusts a campaign's daily budget each day according to a custom distribution scheme, useful when a fixed total budget must be spent over a specific promotional period. Supports even and weighted (front/back-loaded) allocation strategies.
by Google (original), Chiliad (adaptation)·developers.google.com/google-ads/scripts/docs/solutions/flexible-budgets
One table of every campaign's bidding strategy with the two flags that matter: Manual CPC campaigns with enough volume for Smart Bidding, and target-based campaigns too data-starved to learn.
Finds the reallocation hiding in plain sight: efficient campaigns losing volume to budget caps, idle budgets that could fund them, and full budgets funding poor CPAs.
Runs campaigns only inside their date windows — Black Friday starts at 00:00 without anyone staying up, sales end exactly on time, weekend campaigns run only on weekends.
Compares yesterday's average CPC per campaign against its 30-day baseline and alerts on spikes — the earliest visible symptom of a new competitor, broad-match drift, or a bid change gone wrong.
Compares actual spend against your daily budget settings over 1, 7 and 28 days and alerts by email + Google Sheet when Google overdelivers beyond your thresholds.
Compares actual daily spend against the expected pace based on time of day. Logs over- and under-pacing campaigns and can auto-pause overspenders to protect your budget.
Flexible Budgets tracks budget flights defined in a Google Sheet — each row targets campaigns by label, by a substring of the campaign name, or by exact name, with a total budget and start/end dates. Each run it sums the matched campaigns' spend so far, projects the total at the current daily pace, writes the projection back to the sheet, and emails an alert when a flight is forecast to over- or under-spend. Read-only: it never changes your budgets. The config sheet is created automatically on first run.
| Variable | Default |
|---|---|
SPREADSHEET_URL | "" |
SHEET_NAME | "Flights" |
ALERT_THRESHOLD | 0.10 |
EMAIL_ADDRESS | "" |
Created config sheet: https://docs.google.com/spreadsheets/d/.../edit Flight "Summer Sale" (label, 6 campaign(s)): spent 2840.00 of 5000, projected 5680.00 -> OVER Emailed 1 alert(s) to you@example.com
Read-only — never changes budgets. When one row matches multiple campaigns, they share the row's total budget (spend is summed). 'contains' matching uses GAQL LIKE and is case-sensitive. Projections are noisy in the first day or two of a flight and stabilize as it progresses.