What “Limited by budget” costs you, hour by hour.
The label is Google telling you a campaign could do more with more money. The cost is the hours after the money runs out, and no report shows you those hours.
What the label means
Google Ads marks a campaign Limited by budget when its average daily budget is below what Google estimates the campaign could spend. The campaign is still running. What the label says is that on some days it reaches its budget before the day is over and stops entering auctions. Google shows it in the Status column and pairs it with a recommended budget.
Two things the label does not tell you. It does not say when in the day the campaign stopped. And it does not say whether the auctions it missed were worth winning. Both matter more than the label itself.
What Google does with a daily budget
A daily budget is not a ceiling for the day. Google may spend up to twice the average daily budget on any one day, and never more than the monthly spending limit, which is the average daily budget multiplied by 30.4. Over a month it evens out. Within a day it does not have to.
Since 2019, Search and Shopping campaigns have had one delivery method: standard. Google spreads spend across the day according to when it expects the campaign to get results. Once the budget for the day is spent, the campaign stops serving until midnight in the account’s time zone.
So a campaign that runs out at 2pm has the same “Limited by budget” label as one that runs out at 11pm. One of them missed an evening. The other missed almost nothing.
Where the hours go
The closest Google gets to showing you is Search lost impression share (budget): the share of auctions the campaign was eligible for and did not enter because the budget was gone. It is a useful number and it has a limit. It is reported by day, not by hour, so it tells you how much was lost and never when.
The when is what decides the cost. Demand for most products has a shape through the day, and for many accounts the later hours are the better ones: people search after work, compare after dinner, and buy when nobody is at a desk to notice. A campaign that spends its budget on the morning’s traffic and sits out the evening is paying full price for the weaker half of its day.
It is also the half nobody is watching. Budgets are reviewed in office hours. The run-out happens outside them.
The three usual answers
- Raise the budget. The simplest. It also raises spend on every day, including the days the campaign would not have run out, and the label comes back the moment demand grows again.
- Narrow the campaign. Fewer keywords, tighter locations, lower bids. Spend lasts longer because the campaign competes for less, which is a real answer when some of what it was buying was not worth having.
- Accept it. Reasonable when the campaign is a small one. Less reasonable when it is the campaign that converts.
None of them is wrong. What they share is that they are decided once, on an ordinary week, and applied to every day after, including the days that are not ordinary.
A fourth answer
Treat the daily budget as a starting point rather than a rule. Watch how each campaign is spending against its own day, and when a converting campaign is going to run out with demand still coming, extend its budget for that day, within a limit set in advance. When a campaign is spending below its curve, its unspent budget is available to the ones that can use it. Nothing is decided at 9am about what the evening will look like.
That is what Orchadstrate does, hourly, on each account’s own clock. A campaign is never raised past the monthly ceiling or past the cost or return targets you set, and every change is recorded with its reason. The free account scan reads your account once and shows which campaigns ran out today, and when.
Google’s own description of daily budgets and the monthly spending limit is in Google Ads Help. Orchadstrate is not affiliated with or endorsed by Google.