Ad Spend Calculator for Small Businesses

Use this free ad spend calculator to find out how much you should spend on ads, or what your current budget can get you in clicks, leads, customers, and sales. It works for Google Ads, Facebook, Instagram, TikTok, and LinkedIn, and it runs on 2026 ad cost averages you can swap for your own numbers.

What do you sell?
People call, book, or fill out a form, and you close the sale after.
Where do you want to run ads?
$
What are you going for?
Grow means 8% of revenue goes to marketing, in line with the SBA's 7 to 8% guideline.
%
The rest usually covers content, design, SEO, and tools.
%
If 1 in 5 people who call or fill out a form end up buying, that's 20%.
Change the cost per click and conversion rate
$
%

These are estimates, not guarantees, based on published 2026 ad cost averages. Your real results depend on your industry, your offer, your ads, and your website. This is not financial advice. Read the full disclaimer. Free tool by UADV.

How to use this ad budget calculator

First, pick what you sell.
  • Services are for businesses where someone calls, books, or fills out a form, and you close the sale after. Think contractors, med spas, law firms, agencies, and event venues. The calculator follows the path from clicks to leads to paying customers, so it asks how many of your leads end up buying.
  • Products are for businesses where people buy right on your website. The sale happens at checkout, so there's no lead step. The calculator goes straight from clicks to orders and uses your average order value. Online stores usually pay less per click than service businesses, but fewer clicks turn into sales, so the starting numbers change when you switch.
Then pick a mode that matches the question you're asking.
  • How much should I spend? Enter your monthly revenue, how fast you want to grow, and how many new customers you want each month. You'll get two budgets side by side. One is based on what your revenue can support. The other is what it would take to hit your customer goal. If they're far apart, the calculator tells you what to adjust.
  • What will my budget get me? Enter your monthly ad budget, what a customer spends with you, how many leads usually buy, and your profit margin. You'll see your estimated clicks, leads, customers, sales, ROAS, cost per lead, and whether the budget pays for itself.
In both modes, you can open "Change the cost per click and conversion rate" and type in your own numbers. If you've run ads before, your own numbers will always be more accurate than an average.

How much should a small business spend on advertising?

The U.S. Small Business Administration suggests spending 7 to 8% of gross revenue on marketing if you make under $5 million a year and keep a 10 to 12% profit margin. A business bringing in $50,000 a month would set aside $3,500 to $4,000 for marketing under that guideline.

Ads are usually the biggest piece of that budget, but not all of it. You still need content for your ads, a website that turns visitors into customers, and time or tools to manage it all. That's why the calculator asks what share of your marketing budget goes to ads.

Newer businesses, businesses entering a crowded market, and anyone trying to grow quickly often spend more. The "Grow fast" setting uses 12% of revenue for that reason.

How the ad spend calculator works

There's no hidden formula here. This is the math behind every number you see:
  • Clicks = ad budget ÷ cost per click
  • Leads = clicks × conversion rate (the share of clickers who call, book, or fill out a form)
  • Customers = leads × close rate (the share of leads who buy). For products, clicks × conversion rate gives you orders directly.
  • Sales = customers × what a customer spends with you
  • ROAS = sales ÷ ad budget
  • Break-even ROAS = 1 ÷ profit margin
  • Cost per lead = ad budget ÷ leads
  • Cost per customer (CPA) = ad budget ÷ customers
The "How much should I spend?" mode runs the same math backward. It starts with the customers you want and works back to the budget you need.

What is ROAS, and what's break-even ROAS?

ROAS means return on ad spend. It tells you how many dollars in sales you got back for every dollar you put into ads. Spend $1,000, make $4,000 in sales, and your ROAS is 4x.

A 4x ROAS sounds great, but it only means something next to your break-even ROAS. That's the point where your ads pay for themselves and nothing more. You find it by dividing 1 by your profit margin. If you keep 40 cents of every sales dollar, your break-even ROAS is 2.5x. A 4x ROAS on a 40% margin is profitable. The same 4x on a 20% margin (break-even 5x) is losing money.

That's why the calculator asks for your margin. Without it, you can't tell if your ads are actually making you money.

How much do ads cost on each platform?

These are the starting numbers the calculator uses. Your real costs will depend on your industry, your city, your ads, and the time of year. Holiday season is usually the most expensive time to advertise.

Services (clicks that become leads)

For businesses where people call, book, or fill out a form, and you close the sale after.

PlatformCost per clickConversion rateWhere the number comes from
Google Search$5.428.18%WordStream and LocaliQ 2026 Google Ads benchmarks
Facebook$1.927.72%WordStream and LocaliQ Facebook lead campaign benchmarks
Instagram$1.805%UADV planning number (runs through Meta, like Facebook)
TikTok$1.002%2026 TikTok benchmark reports ($0.10 to $1.00 per click)
LinkedIn$8.006%WebFX US LinkedIn benchmarks ($8 to $10 per click)

Products (clicks that buy)

For businesses where people buy right on your website at checkout.

PlatformCost per clickConversion rateWhere the number comes from
Google$1.163.58%2026 ecommerce benchmarks ($0.82 to $1.16 per click)
Facebook$0.701.6%WordStream, LocaliQ, and Digital Applied
Instagram$0.701.5%UADV planning number based on Facebook sales averages
TikTok$1.002.01%2026 TikTok ecommerce benchmarks
LinkedIn$8.001%WebFX click costs. Conversion rate is a UADV planning number.

Google Ads cost

Google Search is where people go when they're ready to buy, so clicks cost more. The average Google Search click cost $5.42 in 2026, with an average conversion rate of 8.18% and an average cost per lead of $66.69, based on WordStream and LocaliQ's study of US search campaigns. Industries like legal, insurance, and home services pay a lot more per click, while restaurants and travel usually pay less.

Facebook ad cost

Facebook clicks are cheaper because people aren't searching for you. You're reaching them while they scroll. Lead campaigns average about $1.92 per click and around $27.66 per lead, while traffic campaigns average about $0.70 per click. Facebook works best when you have strong visuals and a clear offer.

Instagram ad cost

Instagram ads are bought in Meta Ads Manager, the same place as Facebook ads, and you can run them together. Costs tend to land in a similar range. Instagram is a strong fit for businesses that sell something visual, like food, fashion, beauty, fitness, and travel.

TikTok ad cost

TikTok has some of the cheapest clicks and impressions of any platform, but fewer of those clicks turn into leads on average. It works best when your ads look like regular TikTok videos instead of polished commercials.

LinkedIn ad cost

LinkedIn is the most expensive platform per click, usually $8 to $10 in the US. You're paying to reach people by job title, company, and industry. For most local businesses it's not the first place to spend. For B2B services with a high customer value, it can be worth it.

How to make your ad budget go further

The calculator shows you the three levers that change your results the most. You can see each one by changing a single number and watching the output.

  • Your conversion rate

    If more of the people who click end up calling or booking, every dollar goes further. This is usually a website problem, not an ad problem. A faster page, a clear offer, and an easy way to book or call make a big difference.

  • Your close rate

    If more of your leads buy, your cost per customer drops. Following up fast is the simplest way to get there.

  • What a customer is worth

    If customers come back or buy more than once, count what they spend over a year, not just their first sale. That changes how much you can afford to pay for each one.

Frequently asked questions

How much should a small business spend on advertising?

The U.S. Small Business Administration suggests spending 7 to 8% of gross revenue on marketing if your business makes under $5 million a year and keeps a 10 to 12% profit margin. Ads usually take a big share of that. For a business making $50,000 a month, that works out to $3,500 to $4,000 a month for marketing. Newer businesses and businesses in crowded markets often spend more.

How much should I spend on Google Ads?

Start with how many customers you want. At 2026 averages of $5.42 per click and an 8.18% conversion rate, one lead on Google Search costs about $66. If 1 in 5 leads buys, one new customer costs around $330 in ad spend. Multiply that by the number of customers you want each month to get your budget.

How much does Google Ads cost?

Google Ads has no minimum spend. You set your own budget and pay when someone clicks your ad. The average Google Search click cost $5.42 in 2026, and the average cost per lead was $66.69, according to WordStream and LocaliQ. Keywords in legal, insurance, and home services can cost much more per click.

How much do Facebook ads cost?

In WordStream and LocaliQ's benchmarks, Facebook ads average about $0.70 per click for traffic campaigns and $1.92 per click for lead campaigns. The average cost per lead is about $27.66. Costs vary a lot by industry, so plug your own numbers into the calculator when you have them.

How much do Instagram ads cost?

Instagram ads are bought through Meta Ads Manager, the same place as Facebook ads, so costs tend to fall in a similar range. Our calculator uses $1.80 per click as a planning number. Your real cost depends on your audience, your ads, and the time of year.

How do you calculate ROAS?

ROAS stands for return on ad spend. Divide the sales your ads brought in by what you spent on them. If you spent $1,000 and made $4,000 in sales, your ROAS is 4x, which means you made $4 for every $1 you spent.

What is break-even ROAS?

Break-even ROAS is the lowest ROAS where your ads still pay for themselves. To find it, divide 1 by your profit margin. With a 40% margin, your break-even ROAS is 2.5x. Anything above that is profit, and anything below it means you're losing money on your ads.

What is a good ROAS?

A good ROAS is any number above your break-even ROAS, and the higher your margin, the lower that bar is. A business with a 60% margin breaks even at about 1.7x, while a business with a 25% margin needs 4x just to break even. That's why you need to know your margin before you judge your results.

What is a good cost per lead?

A good cost per lead is one that still leaves you a profit after the sale. If a customer brings you $400 in profit and 1 in 5 leads buys, each lead is worth $80 to you. Anything under $80 per lead makes you money, and anything over it doesn't.

Want a second set of eyes on your ad budget?

This calculator gives you a solid starting point. If you want someone to look at your actual numbers and tell you where the money should go, book a free strategy session with our paid ads team. You'll talk directly to the people who run the campaigns.

Book a free strategy session

Sources

Disclaimer

This calculator and the information on this page are for general educational purposes only. They are not financial, legal, tax, or business advice, and using them does not make you a UADV client.

All results are estimates. They are based on the numbers you enter and on published industry averages, which may be out of date or may not fit your business. Your real ad costs, leads, sales, and return depend on things we can't predict or control, like your industry, location, competition, ad platforms, offer, website, and timing. UADV does not promise or guarantee any specific result.

Check your numbers with your own accountant or financial advisor before you make budget decisions. UADV is not responsible for any losses, costs, or decisions made based on this tool or this page. Industry benchmarks belong to their original publishers, who are not connected to UADV and do not endorse this tool.

By using this calculator, you agree to our Terms of Service.

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