ChatGPT Ads' $25 Daily Minimum: When It's Enough and When It Isn't

$25 a day is enough to start testing ChatGPT ads, but rarely enough to scale them. That one number decides whether your first campaign teaches you something or just burns budget.

Since OpenAI opened its self-serve Ads Manager to all advertisers in May 2026, the most common question we get from clients is simple: how much do we need to spend? The official answer is a $25 minimum daily budget per campaign (€15 / £15 in Europe). The useful answer depends on your goal, your industry and how many campaigns you plan to run.

This post breaks down how the budget works, what $25 actually buys, and when it helps or hurts.

How ChatGPT ads budgets actually work

The $25 is a per-campaign floor, and "daily" means a seven-day average rather than a hard daily cap. Five rules matter:

The averaging change catches people out. If you check spend daily, a $48 Tuesday looks like a mistake. It isn't. Judge spend over the week.

What $25 a day actually buys

At $25/day (about $760/month), most advertisers get 5–8 clicks a day, and only 1–3 in expensive verticals. Here's the math, using OpenAI's recommended bids and reported market prices:

The conversion rates are illustrative. Your own landing page data should replace them. The point stands either way: at the minimum, you get a handful of conversions a month. That's enough to spot a signal, not enough for an algorithm to optimize on.

When $25 a day is a good idea

The minimum works well when your goal is learning, not volume.

• You're testing a new channel. ChatGPT ads are new for everyone. $25/day tells you whether your category shows up in relevant conversations before you commit real budget.
• You want to learn the context. The first job on a new platform is to find which conversations trigger your ads and which creative earns the click. That's research, and research doesn't need scale.
• You're a smaller brand. A boutique hotel, a local clinic or a niche shop can enter the same auction as large advertisers.
• You're in a low-competition niche. If CPCs sit near the $3 end, $25 buys enough clicks to judge traffic quality within two or three weeks.
• Cash flow matters. Postpay billing means you aren't pre-loading a balance before you know the channel works.

When $25 a day is not enough

The minimum fails when you expect performance results from it.

• You want conversion bidding to work. Optimized bidding needs a steady flow of conversions to learn. A few a month leaves it guessing, so results swing and costs stay high.
• You're in a competitive vertical. With clicks at $8–18 in software or finance, $25 buys 1–3 clicks a day. You'll wait months for meaningful data.
• You need more than one campaign. The floor is per campaign. Testing three offers or audiences properly costs $75/day. On a tight budget, teams merge everything into one campaign and can't tell what's working.
• You report daily. The 7-day averaging means a $25 budget can spend $50 on a single day. Clients watching daily dashboards will see spikes that look like overspend.
• You're up against bigger budgets. In a crowded auction, a low budget gets thin, uneven delivery. Your test may simply take longer to gather data.

A practical testing plan

Start at the minimum, learn for three weeks, then scale only what earns it.

1. Weeks 1–3: learn at $25/day. One campaign, one clear offer, click-based bidding with a $3–5 max CPC. Track which conversations trigger your ads, click-through rate and on-site engagement.
2. Week 4: decide. Compare cost per engaged visit with Google and Meta. If ChatGPT traffic is cheaper or better quality, keep going. If not, pause and revisit in a quarter.
3. Weeks 5–8: scale the winner. Raise the budget enough to reach a steady flow of conversions each week, usually several times the minimum. Only then switch to conversion bidding.
4. After that: add campaigns one at a time. Each new offer or audience gets its own $25+ budget and its own learning period.

Always judge spend over 7 days, and tell clients upfront that daily spend will vary.

The bottom line

The $25 minimum makes ChatGPT ads easy to start, not easy to scale. Use it to answer one question: is this channel worth more budget for us? Once the answer is yes, budget for the data volume your bidding strategy needs, not for the platform's floor.

Thinking about testing ChatGPT ads for your brand? Get in touch and we'll help you set up a test that actually teaches you something.