Clients ask us this all the time: how much money should I keep in my Google Ads account so ads don’t stop? The short answer: a reserve for a week of spending, and never let the balance reach zero. Below we explain where this rule comes from, what in it is confirmed by Google’s help, and what is our own practical experience.
A note on limits first. That ads stop when the money runs out, and how long a payment takes, is written in Google’s help. But “impressions slow down when the balance is low” and “results jump after a top-up” are observations from practice, not a quote from the documentation. That is how we present them: “in our experience”.
1. What happens when the money runs out
What it is. There are two main ways to pay for Google Ads. The first is manual payments: you transfer money in advance (by invoice or card), and ads spend it while it lasts. According to Google’s help, when your payment is used up, your ads will stop running. The second is automatic payments: Google charges your card after the costs have accrued. The problem here is different: if the bank declines the payment, Google may suspend your ads.
What it risks. Ads simply go quiet. Everything in the account is set up, campaigns are “enabled”, but there are no impressions. Leads vanish, and people look for the cause in settings when it’s the balance.
Ask: which payment method do we use and what is the balance today?
Where to look. The “Billing” menu in Google Ads, and the payment method settings: Billing → Settings. Only users with Admin or Edit Payments access can change them.
2. Why not run it down to zero
What it is. In our experience, when little money is left in the account, impressions can already start to slow down. And when the money is gone, ads stop completely.
What it risks. After a top-up, campaigns spend more than usual for a few days, and results are unstable: lots of leads one day, almost none the next. In other words, you raise your own cost per lead. This is not a quote from the help pages; it’s what we see working with clients. There may be several reasons, and we don’t claim which is the main one. The takeaway is practical: a stop costs more than a timely top-up.
Ask: has the account hit zero in recent months, and what happened to leads then?
Where to look. The report by day: were there days with zero impressions in the middle of the month? If so, compare them with top-up dates.
3. The rule: a reserve for a week of spending
What it is. Our rule is simple. Take your average daily spend and multiply it by seven: that is the reserve below which it’s better not to go. When there are three to four days left, top up.
What it risks. If you wait until the last moment, any payment delay (a weekend, holidays, a mistake in the payment reference) means ads stop. A week’s reserve leaves time to sort everything out calmly.
Ask: what is our daily spend and how many days does the current balance cover?
Where to look. Daily spend is visible on the campaigns page. If in doubt, divide monthly spend by the number of days. We covered why actual daily spend can differ from the daily budget in a separate article.
What others say. Practitioners advise differently: some top up right before the end, others keep a reserve of several daily budgets, and others, like us, a week. Officially Google doesn’t name a required balance, but its help on prepayment says it warns you by email when the balance falls to roughly a week of ad costs, or when the funds are used up. So a week matches Google’s own benchmark.
4. A payment doesn’t arrive instantly
What it is. Google’s help for manual payments says: it may take 24-48 hours, or up to 2-5 business days, for the payment to reflect in your Google Ads account. Bank transfers can take longer than card payments.
What it risks. If you top up on the day the money ran out, ads stay off until the payment is credited, sometimes for almost a week. That is why we set the top-up three to four days before the end: that is the upper limit from the help pages plus a small cushion.
Ask: when exactly do we top up the account and who is responsible for it?
Where to look. You can see the payment date and status in the “Billing” section. Google can also email you when the balance is getting low or is used up. But those emails are not guaranteed, so you can’t rely on them as your only reminder.
If the money doesn’t arrive. Specialists reported failures in crediting payments to Google Ads balances in 2025. So keep the payment confirmation with the transaction number: it is what you quote to Google support if the money takes too long to appear in the account. It is one more argument for a week’s reserve.
5. A backup payment method
What it is. For card payments, Google’s help recommends adding a backup payment method: if the primary one fails, the money is charged to the backup, and ads don’t get interrupted.
What it risks. One card with an exhausted limit or an expired date, and ads are off. The bank declines the payment, not Google, so the problem has to be solved with the bank.
About a new card. Get it ready in advance. According to specialists in an industry chat, the Google Ads payment profile can decline a freshly issued virtual card even though the bank confirms it is active, while a few months later the same card was accepted. Why that happens is unknown: it is colleagues’ observation, not a rule from the help pages. One more tip from industry articles: keep a separate card for ads rather than the main one holding the business’s working funds. That makes charges easier to see, and any potential loss is limited by that card’s limit.
Ask: do we have a backup card, and is the limit of the main one enough for a month of ads?
Where to look. Billing → Settings → payment methods.
6. Don’t pay in more than you need
What it is. A manual payment sits in the account until it is spent, and getting an unspent balance back is not simple. According to Google’s help, the remaining balance is refunded only after the account is closed, to the payment method you paid with. For a card this is usually about two weeks plus up to 10 business days for the bank; for a bank transfer it takes longer. Funds from promotional credits are not refunded.
What it risks. A big payment “just in case” freezes money that could be working in your business, and you can’t quickly take it back. That is why our reserve is a week of spending, not a quarter.
Ask: how much is in the account right now, and is it more than you need for the next few weeks?
Summary: what to do today
- Find out which payment method you use: in advance or automatic.
- Check the balance and count how many days it will last.
- Set a rule: a reserve for a week of spending, top up three to four days before the end.
- Add a backup payment method.
- Check whether the balance hit zero in recent months.
- Don’t pay in more than you need for a few weeks: getting a balance back takes a long time.
It takes about ten minutes and removes one of the silliest reasons ads can stand still. If leads have already dropped, go through the seven checks in our article; the money in the account comes first on the list. To see how we run campaigns, go to the search advertising and Performance Max sections.
Want a free audit of your Google Ads account? Send us a request: we will look at your account and tell you what is worth changing.