Question

How can I set different daily budgets for Google Ads campaigns depending on the day of the week?

Answer 1

Google Ads doesn’t let you directly assign different budgets per weekday in the standard interface but you can do it with Google Ads Scripts.

Here’s how it works:

• Write (or copy-paste) a script that checks what day it is.

• The script then updates your campaign’s daily budget based on a budget map you define (e.g., $150 Mon–Thu, $175 Fri, $100 Sat–Sun).

• Schedule the script to run once daily (e.g., 7 AM).

/**

 * Sets daily budgets by weekday for campaigns labeled "BUDGET_SCHEDULE".

 * Schedule: Daily (run once each morning, e.g., 07:00)

 */

function main() {

  var tz = AdsApp.currentAccount().getTimeZone();

  var day = Utilities.formatDate(new Date(), tz, 'EEE'); // Mon, Tue, ...

  var labelName = 'BUDGET_SCHEDULE';

  // Define your weekday budget map (in account currency)

  var budgetByDay = {

    'Mon': 150,  // higher volume days

    'Tue': 150,

    'Wed': 150,

    'Thu': 175,  // competitive day

    'Fri': 175,

    'Sat': 100,  // lower volume

    'Sun': 100

  };

  var todayBudget = budgetByDay[day];

  if (todayBudget == null) {

    Logger.log('No budget defined for ' + day + '. Exiting.');

    return;

  }

  ensureLabel_(labelName);

  var it = AdsApp.campaigns()

    .withCondition("LabelNames CONTAINS_ANY ['" + labelName + "']")

    .withCondition("ServingStatus != ENDED")

    .get();

  var updated = 0, skippedShared = 0;

  while (it.hasNext()) {

    var c = it.next();

    var b = c.getBudget();

    if (b.isExplicitlyShared()) {

      // OPTIONAL: update shared budgets by name instead (see helper)

      skippedShared++;

      continue;

    }

    if (Math.abs(b.getAmount() - todayBudget) > 0.0001) {

      b.setAmount(todayBudget);

      updated++;

    }

  }

  Logger.log('Updated ' + updated + ' campaign budget(s) to ' + todayBudget + '. Skipped shared: ' + skippedShared);

  // OPTIONAL: If you use shared budgets, uncomment and map names → amounts.

  // updateSharedBudgets_({

  //   'Brand_Shared': todayBudget,

  //   'PMax_Shared': todayBudget * 1.2

  // });

}

function ensureLabel_(name) {

  if (!AdsApp.labels().withCondition("Name = '" + name + "'").get().hasNext()) {

    AdsApp.createLabel(name);

  }

}

// OPTIONAL: Update shared budgets by name map (name → amount)

function updateSharedBudgets_(nameToAmount) {

  var it = AdsApp.budgets().get();

  var touched = 0;

  while (it.hasNext()) {

    var bud = it.next();

    var name = bud.getName();

    if (nameToAmount.hasOwnProperty(name)) {

      var amt = nameToAmount[name];

      if (Math.abs(bud.getAmount() - amt) > 0.0001) {

        bud.setAmount(amt);

        touched++;

        Logger.log('Shared budget "' + name + '" set to ' + amt);

      }

    }

  }

  Logger.log('Shared budgets updated: ' + touched);

}

Steps to use:

1. Add a label like BUDGET_SCHEDULE to campaigns you want controlled.

2. Go to Tools & Settings → Bulk Actions → Scripts → +.

3. Paste the code, authorize, save.

4. Schedule it to run daily.

Pro Tip: If you use shared budgets, you’ll need to adjust the script slightly to target the shared budget names.