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Budget pacer: the daily budget that actually lands on your monthly number
Your budget and your pace are two different numbers, and most pacers confuse them. Dividing what is left by the days left gives you a spending rate — enter it as your budget and the monthly limit can land below the target you were aiming at. This works out the budget that actually raises your ceiling, then tells you whether the constraint is the budget or the delivery.
1. Your budget
Two figures, because whether you are short of budget or short of delivery is the whole question.
7 = every day. 5 = weekdays only.
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CalculatingThe calendar pacing map, schedule analysis and action list unlock below.
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Summary
The first figure is the number to enter in Google. The pace is how fast it has to leave your account, which your ad schedule affects. Neither is a forecast: both are arithmetic on the four numbers above.
Budget against your goal
Your target conversions are converted into a budget using your own CPA, then compared with the budget you have. The gap is the honest answer to "can I hit my number this month?".
| Line | Amount |
|---|---|
| Target conversions | — |
| Your CPA | — |
| Budget needed for that goal | — |
| Plus contingency reserve | — |
| Total budget the goal requires | — |
| Budget you have | — |
| Gap | — |
Calendar pacing map
Each cell is one day. Days that can serve show the load that day has to carry, and days your ads do not serve are marked. Darker cells are days further from today, where the month's remaining spend is more concentrated.
What to do next
How the pacing maths works
Two numbers decide whether you are on track: how much of your monthly target is left to spend, and how many days remain on which your ads can actually serve. Divide the first by the second and you have the daily budget you need. That is the whole calculation, and almost every mistake in budget pacing comes from using the wrong denominator.
1. The monthly spending limit
Google sets your average daily budget, and uses it as the basis for charging. The monthly spending limit is the ceiling on what you will be billed in a billing period, and it is the average daily budget multiplied by 30.4, the average number of days in a month. Google will never charge you more than that in a month.
The consequence is mildly counter-intuitive: 30.4 is an average, not the length of your month. A 31-day month gives you slightly more days than your budget assumes, and February gives you fewer. This tool uses the real number of days in the month you have selected, and shows the 30.4 figure separately, so you can see the difference rather than inherit it.
2. Overdelivery, and the 2× daily cap
Demand is not flat. On a day when your auction is unusually competitive, Google may spend up to twice your average daily budget in a single day. This is called overdelivery, and it exists so you do not miss demand spikes.
It is a burst allowance, not a new sustainable rate. If you plan on spending 2× your daily budget every day, you will be surprised by the monthly bill. The monthly limit still holds regardless of how the days are distributed.
The formula, in full
- Budget left = monthly target − spend so far
- Daily budget that reaches the target = monthly target ÷ 30.4
- Monthly spending limit = average daily budget × 30.4
- Still spendable this period = monthly spending limit − spend so far
- Unreachable at this budget = budget left − still spendable
- Pace per calendar day = budget left ÷ calendar days left
- Pace per serving day = budget left ÷ active days left
- Peak single day = average daily budget × 2
- Budget for a goal = target conversions × CPA, plus the reserve
Notice which formulas contain a day count. Only the two paces do. The budget recommendation does not, and cannot: the cap is a property of the billing period, so no number of days remaining makes the target cheaper or more expensive. This is also why the budget figure is the one to enter in Google and the pace is only a reference for how fast the money has to leave the account.
Nothing else is applied. There is no demand forecast, no auction model and no seasonality guess, because those would be invented numbers dressed up as predictions. Where this tool and Google Ads disagree about what will happen, Google is right about its own behaviour and this tool is right about the arithmetic on your inputs.
Ad schedules change the load, not the budget
If your campaign runs weekdays only, it cannot spend on Saturday or Sunday, so the same monthly limit has to be delivered across five sevenths of the calendar. Every day that does serve carries roughly 1.4× the average, and daily figures will look far more volatile than the monthly average suggests. What the schedule does not do is change your budget.
Why the budget is unaffected
The monthly spending limit is the average daily budget × 30.4. It is calculated from the budget you set and applies to the billing period as a whole. It is not prorated by how many days your ads can run, so a weekdays-only campaign and a seven-day campaign with the same budget have the same ceiling.
That is why the daily budget that reaches a target is simply the target ÷ 30.4. Adding or removing serving days cannot change a ceiling that is not derived from them.
What the schedule does affect
Concentration. With five serving days in seven, each serving day has to carry about 1.4× the calendar-day pace, and 2× on a single day is still available as a burst on top of that. Daily numbers stop being comparable to each other, which is exactly when operators misread a quiet Tuesday as a problem.
Practically: judge the month rather than a single day, and if a serving day is running well below the pace, the cause is almost always delivery at auction — search volume, your maximum CPC, Quality Score — rather than the monthly limit.
On track, budget limited, or budget remaining
Google Ads reports one of three pacing statuses. They describe the relationship between the budget you have left and the spend you still need to make — not your performance. A campaign can be "on track" and unprofitable, and "budget limited" and highly profitable.
On track
Spend to date is consistent with the monthly budget and the forecast. The daily budget you need is close to the one you already have. No budget change is required.
Do not "optimise" this. The most common response to an on-track month is to raise the budget anyway, which lowers efficiency for no gain.
Limited by budget
Google reports a campaign as limited by budget when it is holding spend back and missing 5% or more of potential traffic. In practice, the budget you still need to spend exceeds what is left in the month.
Raising the budget only pays if the marginal traffic converts at or above your break-even return. Check that before raising anything.
Budget remaining
A significant portion of the monthly budget is projected to go unspent. The month will finish under target even if performance is good.
Two honest causes: your budget is genuinely too high, or something is constraining delivery — ad scheduling, low search volume, bid limits or a quality score holding your ads back.
How to use this without fooling yourself
Pacing arithmetic is easy. The judgement is in which number you feed it. Most budget mistakes are made by entering a number that flatters the plan.
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Set the real monthly target, including the reserve
The target is the budget you have actually approved, not the number you hope converts. If finance has not signed off on more, a higher target is fiction, and a pacer will happily tell you how to spend money you do not have.
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Enter spend to date from the same billing period
Use a single billing period consistently. Mixing a calendar month of spend with a billing cycle of budget produces a confident, wrong answer, because your limit runs per billing period.
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Set active days to your real ad schedule
Weekdays only means 5. Business hours on weekdays still means 5, because a day is counted or it is not. This changes the per-day load and the volatility of daily figures. It does not change the budget, so leave it alone unless the schedule genuinely changed.
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Take your CPA from a comparable period
A CPA from a quiet month understates the cost of the same conversions in a peak month, which makes the required budget look affordable when it is not. If you are planning for a seasonal peak, use the peak CPA.
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Re-run weekly, and act on the direction
The required daily budget is a moving target. It rises as the month progresses when you are behind, and falls when you are ahead. One weekly check is enough; daily checking invites you to react to auction noise.
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Decide whether to raise budget or fix efficiency
If the gap to your goal needs far more budget than you would gain from the extra conversions, the constraint is your offer, landing page or conversion rate — not your budget. Raising spend into a broken funnel just buys more of the same loss.
What to do with the answer
Once you know the daily budget you need and the status you are in, the useful work is deciding which lever to pull. Both levers are legitimate; they are not substitutes.
If you are budget limited
- Raise the average daily budget to the figure the tool gives as "daily budget that reaches the target", and re-check in 48 hours rather than in two minutes. That figure exists to lift your monthly spending limit, so it is the one that changes what is reachable.
- Prefer raising the budget on campaigns that are not already spending their limit. Money added to a campaign that is already capped changes nothing.
- Watch profit, not conversions, after the increase. Volume with falling margin is not success.
- Check whether the campaign is limited by budget in Google's own Insights page before you change anything — the tool's status is arithmetic, theirs is behavioural.
If you have budget remaining
- You can lower the average daily budget to the figure the tool gives and still keep the limit above your target, banking the difference rather than chasing volume you cannot convert.
- If the limit is already above the target and you are still behind, the constraint is delivery rather than budget: check the ad schedule, search volume, bid limits and Quality Score before adding any budget.
- Look at impression share lost to rank. If you are losing most of it to budget you have not set, raise it. If you are losing it to competitors' relevance or quality, more budget will not help.
- Move the unspent budget to a campaign that is actually budget limited, rather than letting it idle.
Planning a whole year
Most accounts are not flat across twelve months. Retail peaks in November and December, travel peaks in the school holidays, B2B budgets are spent in the last quarter. If you are setting annual budgets, allocate against expected demand and auction pressure rather than splitting the year into twelve equal slices — an equal split guarantees you are underfunded at peak and overspending in the trough.
The honest caveat: this tool does not know your seasonality. Only your own year-on-year performance does, and a first year of data means you are guessing. Guessing explicitly, in a spreadsheet, beats guessing implicitly in a platform.
Five budget pacing mistakes that cost real money
Every one of these produces a number that looks reasonable and a month that finishes badly.
1. Setting your budget from days-remaining arithmetic
The most common error, and the one this tool exists to prevent. Dividing what you have left to spend by the days remaining produces a pace, not a budget. Entering it as your average daily budget can leave the monthly spending limit below the target you were aiming at, because the limit is that budget × 30.4 and 30.4 is fewer days than a 31-day month. The budget that works is always target ÷ 30.4.
2. Treating 2× daily as a sustainable rate
Overdelivery on a spike day is fine. Planning on 2× every day is not, because the monthly limit does not move to accommodate it. Check the month, not the good day.
3. Using a CPA from a different season
Clicks cost more when competition is higher, which is exactly when you are trying to spend more. A cheap historical CPA is the most optimistic possible input to a budget plan.
4. Raising budget on an already-capped campaign
A campaign already hitting its daily limit cannot spend more, however much budget you give it. The extra budget flows nowhere. Look for the campaign that is actually constrained.
5. Reading "on track" as "profitable"
Pacing status describes budget consumption. It says nothing about whether the conversions are worth what you paid. A campaign can spend its entire budget on traffic that loses money and still be perfectly on pace.
And a sixth: mixing billing periods
Your monthly spending limit applies per billing period, which is not always the calendar month. Spend from a different period than your budget produces a figure that is arithmetically valid and practically meaningless.
Your budget data never leaves this page
This tool needs a handful of numbers, and it does not need a server to work with them.
What is calculated where
Every figure on this page is computed in your browser by JavaScript already downloaded to your device. There is no calculation endpoint. Refresh the page with your network disconnected and the tool still works.
Your budget, spend to date, CPA and target conversions are never transmitted, logged or stored. Nothing is written to browser storage either — close the tab and the numbers are gone.
Why we still ask for an email
To send you the plan as a PDF-style summary, and because the underlying business is lead generation. We store your name, work email and company, we do not sell them, and the submission is rate limited and honeypot protected. We do not ask for your ad account data, and we would not want it.
The full breakdown of exactly what is stored is on our privacy policy.
Budget pacing questions, answered properly
What is the difference between average daily budget and monthly spending limit?
Average daily budget is the figure you set, and it is the basis Google uses for charging. The monthly spending limit is the hard ceiling on your bill for one billing period, and it equals the average daily budget multiplied by 30.4. You can spend more than your daily budget on a given day, but you will never be charged more than the monthly limit, and if the daily rate consistently produces more than the monthly limit, spend is held back.
How do I work out my daily budget for the rest of the month?
Divide your monthly target by 30.4. That is the whole calculation, and the reason is that the monthly spending limit is the average daily budget × 30.4 — so this figure makes the limit equal your target exactly. Days remaining do not enter into it, because the limit applies to the billing period as a whole rather than to the days that are left.
What days remaining do give you is a pace: how quickly the remaining money has to leave the account. Compare that pace against the budget you already have. If the pace is above your daily budget but your limit is still above the target, the problem is that the money is not being spent, not that the budget is too small.
What does limited by budget mean?
It means the campaign is restricting spend to stay within budget goals and is missing 5% or more of potential traffic. In practical terms, the amount you still need to spend is greater than the amount left in the month. The status describes budget consumption, not profitability — a budget-limited campaign can still be losing money on every conversion.
Can I spend more than my average daily budget in one day?
Yes, up to twice your average daily budget. This overdelivery is deliberate, so you capture demand spikes without raising your budget. It is a burst allowance, not a sustainable rate: a month still cannot exceed 30.4 times your daily budget, and if daily figures hover near 2× then the month is being capped and your delivery is being throttled.
Do ad schedules change how a budget is spent?
They change when it can be spent, not how much you may spend. Ads do not serve on days the ad schedule disables, so a weekdays-only campaign has to deliver the same monthly limit across five sevenths of the calendar. Each day it runs then carries about 1.4× the average, and daily figures stop being comparable with one another.
What a schedule does not do is change the monthly spending limit, which stays at 30.4 times the average daily budget however few days you run. That is why the daily budget that reaches a target is the target ÷ 30.4 regardless of the schedule.
Should I raise my budget or improve performance instead?
Raise it only if the extra conversions are worth more than the extra budget. Multiply the additional budget by your current conversion rate to get the expected extra conversions, then multiply that by your margin. If the answer is thin, you are better off raising conversion rate or average order value, because raising budget into a weak funnel buys more of the same loss. If you are under-spending, the opposite applies: the honest question is whether your budget is too high or delivery is being constrained.
How much budget do I need for a target number of conversions?
Target conversions times your CPA, plus a contingency reserve of five to fifteen percent for volatility. Take the CPA from a period with comparable seasonality — during a peak, clicks cost more, so a quiet-month CPA will understate the real cost. Treat the reserve as a buffer you expect not to spend, not as budget to deploy.
What does this calculator not do?
It does not forecast demand, model the auction, or predict conversion rates. Google Ads makes its own forecasts from your historical performance, seasonality and market trends, and those forecasts are what the platform will act on. This tool does arithmetic on what you enter, shows its working, and stays out of the way. Where the two disagree, Google is authoritative about its own behaviour.
Sources and method notes
The platform mechanics quoted here — the 30.4-day monthly spending limit, the 2× daily overdelivery cap, the three pacing statuses and the 5% lost-traffic threshold — are Google's own documented behaviour, not estimates. The 30.4 multiplier and the 2× cap are the two figures the tool treats as facts; everything else on this page is arithmetic on your four inputs.
One claim was removed from this page in September 2026. An earlier version stated that Google changed pacing for scheduled campaigns on 1 June 2026, and used that to argue that dividing by active days was no longer valid. We could not substantiate the change from a primary source, so it was removed rather than hedged. The tool's model was rebuilt on what follows directly from the two documented figures, which makes the schedule explanation unnecessary for the budget and better for the pace.
The status thresholds this tool uses to classify a month are our own stated method. Google defines "limited by budget" against modelled traffic loss, which this tool cannot compute without your data. We classify on the arithmetic relationship between the budget you need and the budget you have, and we say so rather than implying we are reproducing Google's model.
Where to verify the platform mechanics
- Google Ads Help — About average daily budget and spending limits
- Google Ads Help — About budget pacing insights and the three statuses
- Google Ads Help — Choose your bid and budget, for overdelivery and the 2× cap
Last reviewed 2026. If your own data contradicts a default here, change the default rather than the conclusion.