How Much Should You Spend on Facebook and Instagram Ads?
The right Meta ads budget comes from your numbers, not a guess. Use this simple formula to find a starting budget that gives the algorithm enough data to learn.
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Short answer: set your Facebook and Instagram ads budget from your numbers, not a round figure. Work out the cost per lead or sale you can afford, then budget enough for Meta’s system to get a steady flow of conversions. A useful rule of thumb is to aim for roughly 50 optimization events per ad set per week while the campaign is learning. If that’s out of reach, optimize for a more frequent event or consolidate your campaigns.
Below is a simple formula, a testing plan, and the mistakes that waste the most money. Want specialists to run it? See our Meta Ads management service.
Why is there no single “right” budget?
Because the right budget depends on three things that differ for every business:
- What a customer is worth to you, including repeat purchases.
- How expensive your audience is to reach, which varies by country, industry, and season.
- How well your ads and landing pages convert, which is mostly down to creative and offer.
A local salon and a national software brand can both succeed on Meta with very different budgets. What they share is a budget grounded in their own economics.
How do you calculate a starting budget?
Use this four-step formula.
Step 1: Find your affordable cost per acquisition
Work out the maximum you can pay for a customer and stay profitable.
- E-commerce: average order value × gross margin. If your average order is $80 and your margin is 50%, you break even at $40 per first purchase (more if customers reorder).
- Lead generation: customer value × close rate. If a customer is worth $2,000 in profit and you close 1 in 10 leads, you can afford up to $200 per lead to break even.
Step 2: Estimate your target cost per result
Pick a target below your break-even point, for example $25 per purchase or $80 per lead. If you’ve run ads before, use your historical numbers. If not, start with a conservative estimate and refine it after the first two weeks.
Step 3: Work out what the algorithm needs
Meta’s guidance is that an ad set usually exits the learning phase after about 50 optimization events within a week. You don’t need to hit that exactly, but budgets far below it keep campaigns stuck in learning, where performance is less stable.
Weekly budget ≈ target cost per result × 50 (per ad set in learning)
At $25 per purchase, that’s about $1,250 per week, or roughly $180 per day for one ad set.
Step 4: Adjust to reality
If that number is higher than you can spend, you have three good options:
- Consolidate. Run one campaign with one or two ad sets instead of many small ones, so conversions aren’t spread thin.
- Optimize for a more frequent event. For example, optimize for “add to cart” or “initiate checkout” at first, then move to purchases once you have volume.
- Improve conversion rates. Better offers, landing pages, and creative lower your cost per result, which lowers the budget you need.
What should a first test look like?
A simple, effective testing plan for a new account:
| Phase | Duration | Focus |
|---|---|---|
| Setup | Week 0 | Pixel + Conversions API, domain verification, event priorities, audiences |
| Test | Weeks 1–2 | One campaign, broad targeting, 4–8 varied creatives, one clear offer |
| Learn | Weeks 3–4 | Cut underperforming ads, iterate on winning hooks and formats |
| Scale | Week 5+ | Increase budget gradually on proven campaigns, add new creative every few weeks |
During the first two weeks, avoid big edits. Significant changes to budget, targeting, or creative can restart learning.
Why does creative matter more than targeting?
Meta’s automated targeting has become very good at finding buyers when it gets clear signals. In practice, the creative is now the targeting: the hook, visuals, and message decide who stops scrolling, and the system learns from who converts.
That’s why the best budget plans include a creative budget. Plan to test several distinct angles, such as problem-solution, testimonial, demo, and behind-the-scenes, and several hooks per video. Our content creation team produces this kind of ad creative every month. The same principle applies on TikTok; see how much TikTok ads cost.
Does tracking change how much you need to spend?
Yes, indirectly. If Meta can’t see your conversions, it can’t optimize for them, and you end up paying more for worse results. Before spending seriously:
- Install the Meta Pixel and set up the Conversions API, which sends events from your server and makes measurement more reliable than the browser alone.
- Verify your domain and prioritize your key events.
- For lead generation, send back which leads became customers so the system learns what a good lead looks like.
What are the most common budget mistakes?
- Spreading budget across too many ad sets. Ten ad sets at $10 a day learn slower than one at $100.
- Judging results after two days. Early numbers are noisy. Give campaigns time.
- Doubling budget overnight. Large jumps can destabilize delivery. Scale gradually, or duplicate winners.
- Boosting posts instead of running campaigns. Boosts rarely optimize for sales or qualified leads.
- Running the same ads for months. Creative fatigue raises costs. Refresh regularly.
How should Facebook ads fit with your other channels?
Meta ads create demand: they reach people who weren’t searching yet. Google Ads and SEO capture demand from people who are. Many businesses see the best results when both run together and are measured on blended cost per customer. Our comparison of Performance Max and Search campaigns covers the Google side.
The bottom line
Your Meta ads budget should come from your economics: what a customer is worth, what you can afford to pay, and how many conversions the system needs to learn. Start focused, give campaigns time, invest in creative and tracking, and scale gradually once results are stable.
Want a budget recommendation based on your numbers? Request a free growth audit and we’ll show you the maths.
Frequently asked questions
What is the minimum budget for Facebook ads?
Meta allows very small daily budgets, but tiny budgets give the algorithm little data. A useful test budget is one that can generate a meaningful number of conversions per week.
Should I spend more on Facebook or Instagram?
Usually you don’t choose. Meta’s placements system shows ads across Facebook, Instagram, Messenger and the Audience Network and shifts budget to what performs. You can restrict placements if you have a reason.
How long should I test a Facebook ads budget?
Give a new campaign at least one to two weeks before judging it, and avoid big edits during the learning phase, which can reset learning.
Is ad spend included in agency fees?
Typically not. Ad spend is paid directly to Meta from your own ad account, and agency fees cover strategy, creative and management.
When should I increase my budget?
When cost per result is stable and profitable. Increase gradually, for example by 20–30% every few days, or duplicate winning campaigns, rather than doubling overnight.
Sources
Written by
SEO, AI search, paid media and social specialists
Articles from the MangoGrow editorial team are researched and written by our specialists in SEO, AI search, paid advertising, content, and social media, and reviewed before publishing.
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