You set up a Google Ads campaign with a $10 daily budget. You picked your keywords carefully, wrote decent ad copy, and pointed everything at a landing page you spent a weekend building. Two weeks later, you check the numbers and find that half your clicks came from people searching for 'free marketing tools' and 'marketing jobs near me.' You paid for those clicks. None of them converted.
This is not a targeting problem. It is a negative keyword problem, and it is the single most overlooked optimization in Google Ads for small budgets. Most guides on this topic assume you have a media buyer and a $5,000 monthly budget. Solo founders have neither.
A negative keyword list takes about 15 minutes to build. It can cut your wasted spend by 30 to 50 percent within the first week. For a solo founder running ads on $10 a day, that is the difference between a campaign that pays for itself and one that quietly drains your runway.
What negative keywords actually do
A negative keyword is a search term you tell Google NOT to show your ad for. When someone types a query that contains your negative keyword, your ad simply does not appear. You do not pay for the impression, and you definitely do not pay for the click.
Think of regular keywords as green lights: show my ad when someone searches this. Negative keywords are red lights: if this word appears, stop. Google does not charge you for red lights. It just moves on to the next auction.
The reason this matters so much for solo founders is the math. If your daily budget is $10 and a single irrelevant click costs $3, you just lost 30 percent of your day's budget on one person who was never going to buy. Three junk clicks and your entire day is wasted. A large agency with a $500 daily budget can absorb that kind of leakage. You cannot.
The universal negative keyword list for any small budget
Some negative keywords apply to almost every business. These are searches from people who are looking for free stuff, doing research, hunting for jobs, or trying to fix something themselves. None of them are in buying mode. Add these to every campaign before you spend a single dollar.
The free and cheap crowd: free, cheap, cheapest, discount, budget, affordable, inexpensive, bargain, sale, clearance, wholesale, bulk, coupon, promo code, gratis, complimentary, no cost
The job seekers: jobs, careers, hiring, employment, salary, wages, internship, resumes, recruitment, vacancies, openings, positions, freelance, contractor, remote work
The DIY and research crowd: how-to, DIY, tutorial, guide, tips, advice, learn, course, class, training, school, university, college, definition, what is, wiki, research, case study, PDF, whitepaper, template, example, sample, download
The media seekers: YouTube, video, images, photos, logo, wallpaper, background, clipart, meme, gif
The reviewers and complainers: review, reviews, rating, rated, comparison, vs, versus, alternative, competitor, complaints, scam, legit, worth it, reddit
That is about 50 keywords. Copy them into a negative keyword list in your Google Ads account right now. This alone will block the most common sources of wasted spend.
The three match types and when to use each
Google Ads gives you three ways to add negative keywords, and picking the wrong one can accidentally block good traffic or let bad traffic through. Here is the simple version.
Broad match is the default and the one you should use most. It blocks any search that contains all the words in your negative keyword, in any order. Add 'free software' as a broad negative and 'software that is free' is also blocked. This is what you want for the universal list above.
Phrase match blocks searches that contain the exact phrase in the exact order, even if there are other words around it. Use this for competitor brand names and phrases like 'how to' where the order matters. Add 'how to' as a phrase match negative and 'learn how to fix' is blocked, but 'to how many' is not.
Exact match blocks only the exact search term with nothing else added. Use this sparingly -- mostly for single words that are sometimes harmless in longer phrases. If you sell cake and want to block searches for 'cake' alone (maybe because you only do custom wedding cakes), use exact match [cake]. Searches for 'wedding cake delivery' will still show your ad.
For a solo founder starting out, use broad match for 90 percent of your negatives. It is the safest default. Switch to phrase match for competitor names and exact match only when you have a very specific, data-backed reason.
Where to find your specific money-wasters
The universal list catches the obvious stuff. But every business has unique junk queries that no template can predict. A SaaS founder might get clicks from people searching for their own company name plus 'login.' A plumber might get clicks from 'plumbing parts wholesale.' These are your money-wasters, and they live in one place: the Search Terms report.
Open your Google Ads account, go to Campaigns, then Insights and Reports, then Search Terms. Set the date range to the last 30 days. Sort by cost, highest first. You are looking for two types of searches:
High spend, zero conversions. These are your immediate priority. Someone searched for something, clicked your ad, cost you money, and did not convert. If the search term is clearly irrelevant (like 'free' + your product name), add it as a negative immediately.
High impressions, low CTR. A term that shows up hundreds of times but gets almost no clicks is hurting your Quality Score. Google sees your ad getting ignored and assumes it is irrelevant. Adding these as negatives tells Google to stop wasting impressions on searches that do not match your intent.
For the first two weeks of a new campaign, check this report every 48 hours. Google's broad match is aggressive when it does not have conversion data, and it will burn through your $10 budget fast. After the first month, a 15-minute weekly review is enough for most solo founders.
Where to apply negatives: account, campaign, or ad group
Google Ads gives you three levels for negative keywords. Most solo founders only need the first two.
Account level: Use this for the universal list. These are terms you never want to show for, under any campaign, ever. Go to Tools and Settings, then Account Settings, then Negative Keywords. Add 'free,' 'jobs,' 'DIY,' and the rest of the universal list here. They will apply to every campaign automatically.
Campaign level: Use this for negatives that apply to a specific product or service. If you have one campaign for a paid SaaS tool and another for a free newsletter, add 'free' as a negative only to the paid SaaS campaign. The newsletter campaign should still show for 'free.' Go to the campaign, click Keywords, then Negative Keywords, and add them there.
Ad group level: Skip this for now. It is for preventing internal competition between ad groups in the same campaign, like making sure your 'Nike running shoes' ad group does not steal traffic from 'Nike basketball shoes.' Solo founders running one or two campaigns rarely need this level of granularity.
One pro tip: create a negative keyword list in the Shared Library instead of adding keywords one by one to each campaign. You can apply a single list to multiple campaigns, and updating it once updates everywhere. This saves you from managing the same list in five different places.
The mistakes that will actually hurt you
Most negative keyword advice focuses on what to block. The more dangerous mistakes happen when you block too much or block the wrong way.
Over-blocking with broad match. Adding 'order' as a broad match negative because you kept getting 'order status' queries will also block 'order now,' 'place an order,' and 'how to order.' If a word appears in both irrelevant and high-intent searches, use exact match [order] instead of broad match. This blocks the single-word query while letting 'order now' through.
Premade lists as a crutch. The 200-negative-keyword lists you find on agency blogs are a starting point, not a finished strategy. Every business has unique junk queries. If you only use a generic list and never check your Search Terms report, you are blocking the obvious stuff while letting through the expensive, business-specific waste.
Setting and forgetting. Negative keywords are not a one-time setup. New search terms appear every week. Competitors change their brand names. Seasonal trends create new irrelevant queries. If you built a list three months ago and never touched it since, you are leaking budget. Check your Search Terms report for 15 minutes every week.
Not excluding competitor brand names. People searching for 'HubSpot pricing' do not want your three-person startup's CRM. They want HubSpot. Add your top five competitors as phrase match negatives. If you want to capture comparison traffic, keep terms like 'alternative to HubSpot' or 'HubSpot vs' active -- those are high-intent buying signals. But block the naked brand name searches.
The 15-minute weekly routine
Here is the routine that keeps a $10/day budget from bleeding out. Do this every Monday morning.
Step one: Open the Search Terms report. Set the date range to last 7 days.
Step two: Sort by cost, descending. Look at the top 10 most expensive search terms.
Step three: For each one, ask: would someone searching this ever buy what I sell? If the answer is no, add it as a negative.
Step four: Sort by impressions, descending. Look for terms with 50 or more impressions and a click-through rate below 1 percent. These are hurting your Quality Score. Add them as negatives.
Step five: Scan for new competitor brand names or seasonal queries that crept in. Block them before they eat next week's budget.
That is it. Fifteen minutes, once a week. For a new campaign, do this every 48 hours for the first two weeks. Google needs that data to learn, but you need to be the one deciding which searches get your money.
If you have not set up your campaign structure yet, start with our guide on Google Ads targeting for solo founders. Once your targeting is in place, negative keywords become the second layer of defense that keeps your $10 budget pointed at people who might actually buy. And if you are still figuring out your campaign basics, read our post on how to start Google Ads with $10 a day.