Most advice on Facebook ad budgets starts with a round number: $5 a day, $1,000 a month, or a percentage of revenue. None of those numbers knows anything about your business. The right budget is the one that buys enough leads to win the customers you want, at a cost per lead you can afford, and you can work it out in about a minute.
- Work backwards from customers: new customers wanted, divided by the share of leads that buy, multiplied by what a lead costs.
- At the 2026 average of $27.39 a lead, $500 a month buys about 18 leads and $1,000 buys about 36.
- Meta's own minimum is about $1 a day, but a budget that small rarely buys enough results to learn from.
- Small budgets work best in one ad set. Meta looks for about 50 results a week per ad set to finish learning.
- Keep any management fee separate from the ad budget, and count both when you judge the return.
Work out your budget
Pick your industry for a starting cost per lead, then fill in what a new customer is worth to you, how many leads usually become customers, and how many new customers you want a month.
Fill in all five boxes to see your budget.
Industry figures: LocalIQ's 2026 Facebook benchmarks for lead campaigns. Swap in your own cost per lead once you have one. The $ sign is only a label, so any currency works. Nothing you type leaves this page.
How the sum works
Three numbers decide the budget: how many new customers you want, how many leads it takes to win one, and what a lead costs. Here's the same sum for three kinds of local business:
| Business | Monthly ad budget | Leads needed | Cost per lead | New customers wanted |
|---|---|---|---|---|
| Dental practice | $985, about $32 a day | 16 (1 in 4 buys) | $61.56 | 4 |
| Home improvement | $644, about $21 a day | 15 (1 in 5 buys) | $42.95 | 3 |
| Gym or fitness | $1,084, about $36 a day | 40 (1 in 4 buys) | $27.11 | 10 |
Customer targets and close rates are illustrative. Cost per lead: LocalIQ 2026 averages for lead campaigns.
Then check the budget is worth spending. The dental practice can pay up to $300 a lead, because a $1,200 patient and one in four enquiries buying works out at $300 each, so $61.56 leaves plenty of room. Are Facebook ads worth it for a small business has the full test.
Why the usual rules of thumb miss
"Start with $5 a day." Meta suggests at least $1 a day for ad sets charged by impressions, so $5 is well above the floor. But at the 2026 average of $27.39 a lead, $5 a day buys five or six leads a month. That's too few to tell whether the ads work.
"Spend a percentage of revenue." A widely quoted rule, usually attributed to the US Small Business Administration, is 7-8% of revenue on all marketing for businesses under $5 million in sales with net margins around 10-12%. It tells you what you can afford across all your marketing, not what Facebook needs to produce customers. Use it as a ceiling and the sum above as the plan.
"Copy what a competitor spends." Their customer value, close rate and follow-up are different from yours, so their budget answers a different question.
Small budgets: fewer ad sets
Meta says an ad set becomes learning limited when it's unlikely to get about 50 optimization events in the week after a significant edit. At $27.39 a lead, 50 leads a week is about $1,370 a week. Most small businesses won't get there, and that's fine. But splitting a small budget across several ad sets makes each one learn even more slowly, so keep to one campaign, one ad set and a handful of ads.
Small budgets can work when the campaign is aimed at the right result. One climbing gym we manage runs on daily budgets between £5 and £15 and has returned 2.95x over ten months.
Test first, then scale
Run a test month
Our rule of thumb is to budget for at least 20 leads in the first month, at your expected cost per lead, so you learn your real close rate. At the 2026 average, that's about $550.
Replace the benchmarks with your own numbers
After the test, put your actual cost per lead and close rate into the calculator. Your numbers beat any industry average.
Scale in steps
Raise the budget by around 20% at a time and hold each step for a week, so results have time to settle. Why Facebook ROAS drops when you increase budget explains why bigger jumps backfire.
Stop when cost per customer reaches your ceiling
Each extra dollar buys slightly less ready customers. When the cost of winning one more customer gets close to what a customer is worth, you've found the budget.
The ad budget vs the management fee
If someone runs the ads for you, their fee comes on top of the ad budget and raises the return the ads need. On a small budget the fee can be bigger than the ad spend, which is why a short test run yourself often makes sense first. How much Facebook ads management costs in 2026 covers market rates, and our own prices are on the pricing page.
Selling online?
If you sell through a store rather than taking enquiries, work from margin instead of leads: your break-even ROAS is 1 divided by your gross margin. What is a good ROAS for Facebook ads shows how to set the target, and Meta ads for ecommerce is how we run it.
Questions people ask
How much should a small business spend on Facebook ads per month?
Enough to buy the leads you need to win the customers you want: new customers wanted, divided by the share of leads that buy, multiplied by what a lead costs. For the three examples in this post, that comes to between about $650 and $1,100 a month.
What is the minimum budget for Facebook ads?
Meta suggests at least $1 a day for ad sets charged by impressions. The useful minimum is higher: enough to buy the leads you need to judge whether the ads work. Our rule of thumb is at least 20 leads in the first month.
Is $10 a day enough for Facebook ads?
It can be, in one ad set. $10 a day is about $304 a month, which buys around 11 leads at the 2026 average cost per lead of $27.39. That's enough to learn something, but not enough to split across several ad sets or audiences.
Should I use a daily or a lifetime budget?
A daily budget suits always-on lead campaigns, because spend stays steady and is easy to compare week to week. A lifetime budget suits something with a fixed end date, like an event or a seasonal offer.
How long should I test before increasing the budget?
About a month, or until you have enough leads to see how many become customers. Then raise the budget in steps of around 20% and hold each step for a week before the next.
Should I spend more on Facebook or Google?
It depends on how your customers buy. If they search for what you do when they need it, Google search ads usually come first. If they buy when reminded, Facebook and Instagram usually do more. Many local businesses end up with both.
When shouldn't I increase my Facebook ad budget?
When cost per customer is already above what a customer is worth, or when you can't answer the extra leads quickly. We're not the right fit if you can't commit a real ad budget alongside a management fee. At that stage, a small test run yourself teaches you more.
Want a second opinion on your numbers? Book a strategy call and we'll work out a starting budget with you, from your own figures.
