Solutions · Ad Budget Calculator

Advertising budget calculator for Google, Meta, and TikTok ads

Most ad budgets are set by copying a competitor or picking a round number. This calculator does it the right way: it starts from the revenue you want and works backward. Enter your monthly revenue goal, what an average customer is worth, how well your site converts, and what a click costs, and it returns the monthly ad budget that math actually requires, plus how many customers that buys and what each one costs.

The percentage-of-revenue rule of thumb (spend roughly 7 to 15 percent of revenue on marketing) is a fine sanity check, but it cannot tell you whether a specific target is reachable at your conversion rate and click cost. This tool can. Run your numbers below, see whether the target is efficient, then let AdBot set and manage that budget across Google, Meta, and TikTok every day.

See it run

Last updated July 2026

Ad budget calculator

Live

Monthly revenue goal ($)

Revenue per customer ($)

Website conversion rate

Average cost per click ($)

Monthly budget

to hit the goal

New customers

per month

Cost per customer

implied CPA

Numbers stay in your browser. AdBot sets and manages the budget across Google, Meta, and TikTok to hit your target.

$24M+ in ad spend optimized

CPA ↓ 38% on average

Live in 24-48h

Meta & Google Partner

What you get

A full media buyer, working for you 24/7

Backward from your goal

It starts from the revenue you want, not a percentage, and derives the customers, clicks, and budget needed to get there so the number is grounded in your own funnel.

Shows the true cost

You see the implied cost per customer and return on spend, not just a budget, so you know before you spend whether the target is profitable at your margins.

Then AdBot runs it

A budget only works if it is spent well. AdBot allocates the budget across Google, Meta, and TikTok daily and shifts money to whatever is returning this week.

What it handles

Everything, from research to daily optimization

You set the goal and the budget. AdBot does the work a media buyer would, and reports back in plain language.

Budget derived from your revenue goal
Customers and clicks you actually need
Implied cost per customer and ROAS
Then AdBot spends it across three channels

14-day result

Optimizing

Cost per acquisition

$25

▼ 38%

Return on ad spend

3.6x

▲ 31%

Budget reallocated to winners

How much should I spend on advertising?

Most US businesses spend about 7 to 15 percent of gross revenue on total marketing, and a share of that goes to paid advertising. Newer and fast-growing companies sit at the higher end, established firms with strong word of mouth at the lower end, and B2C usually spends more than B2B. That range is a starting sanity check, not a real budget.

The better method is to work backward from a goal. Decide the revenue you want from ads, divide by your average order value to get the customers you need, divide by your conversion rate to get the clicks, and multiply by your cost per click. That gives a budget your funnel can actually support. The full method, with a worked example, is in our guide on how much to spend on advertising.

How do you calculate an advertising budget?

Calculate an advertising budget from four numbers: your revenue goal, average revenue per customer, website conversion rate, and average cost per click. Customers needed equals revenue goal divided by revenue per customer. Clicks needed equals customers divided by the conversion rate. Budget equals clicks times cost per click. The calculator above does this instantly as you type.

Say you want $50,000 a month, each customer is worth $500, your site converts 3 percent of visitors, and clicks cost $2.50. You need 100 customers, which means about 3,333 clicks, which costs roughly $8,300 a month. That is the budget the goal requires, and it also tells you the implied cost per customer is about $83. If that is below what a customer is worth to you, the target is efficient.

What percentage of revenue should go to advertising?

A common benchmark is 7 to 15 percent of revenue on marketing, with advertising a portion of that, but the right figure depends on margin, growth stage, and customer lifetime value. A high-margin business that keeps customers for years can afford to spend more to acquire them; a thin-margin one cannot. The percentage rule sets a ceiling, the goal-based method sets the actual number.

Two businesses at the same revenue can rightly spend very different amounts. The one with a $2,000 customer lifetime value and a fast payback should outspend the one making a single $80 sale, even though both might quote the same revenue. To pressure-test whether a budget pays back, run the same inputs through our ROAS calculator and set an acquisition ceiling with the CPA calculator.

How AdBot manages your ad budget

Setting the budget is the easy half. The hard half is spending it well every day: bidding to the searches that convert, cutting the ones that waste money, and moving budget to whichever channel is returning this week. Done by hand that is a full-time job; done once a quarter it leaves money on the table.

AdBot does it as software. Give it your URL and a budget and it builds and runs campaigns across Google Ads, Meta, and TikTok, holds spend to a cost per customer below your target, and reallocates daily. Teams weighing software against a hire compare the trade-offs on our AI PPC software page.

Why AdBot

Done-for-you, both channels, flat fee

Not a creative generator, not a rule engine you have to operate. A real AI media buyer.

Build to launch in 48h

Research, creative, structure, and launch across Google and Meta, with no onboarding call.

Optimized every day

Bids, budgets, audiences, and creative tuned 24/7 to drive your CPA down and ROAS up.

No cut of your spend

A flat monthly fee, never a percentage of ad spend. Your budget stays yours.

Good questions

Questions about ad budget calculator

Most US businesses spend about 7 to 15 percent of revenue on marketing, with paid advertising a share of that. Newer and high-growth companies spend more, established ones less. For a precise number, work backward from your revenue goal using order value, conversion rate, and cost per click.

Divide your revenue goal by average revenue per customer to get customers needed, divide that by your conversion rate to get clicks needed, then multiply by average cost per click. The result is the monthly budget your funnel requires. The calculator above computes it live.

A common benchmark is 7 to 15 percent of revenue on marketing overall, with advertising a portion of that. The right figure depends on your margins, growth stage, and customer lifetime value. Higher-margin businesses that retain customers longer can afford to spend more.

Small businesses commonly start Google Ads at $1,000 to $5,000 a month, but the right number depends on your cost per click and how many customers you need. Start with a budget your goal requires at your conversion rate, then scale it up as long as the return holds.

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