Most early-stage SaaS founders either avoid paid ads entirely or burn through AUD 10,000-50,000 in their first month and quit. Neither approach is right. Paid ads work for early-stage software, but only if you understand what you’re actually buying and how to measure whether it’s worth the money.
The core problem is simple: you can’t run brand campaigns or awareness plays when you’re three people and your product is still moving. You need to buy customers or qualified leads today, at a cost that doesn’t exceed what they’ll be worth to you. Everything else is guesswork.
Start with unit economics, not budget
Before you spend a single dollar on ads, you need to know three numbers:
- Customer acquisition cost (CAC): Total spend divided by customers acquired.
- Lifetime value (LTV): Rough estimate of revenue per customer over 12-24 months.
- Your CAC:LTV ratio: Industry consensus is 1:3 is breakeven-ish; 1:5 or better is healthy.
If your software has a AUD 100/month subscription and you keep customers for 18 months on average, your LTV is roughly AUD 1,800. A sensible CAC to acquire that customer is AUD 400-600. If paid ads cost you AUD 1,200 per customer, stop immediately. You’ve got a unit economics problem, not a channel problem.
Many founders skip this step. They see competitors running ads and assume ads “work.” But if your competitor has product-market fit and a 3-year retention curve, and you’re still at 40% churn month-on-month, their ad strategy doesn’t scale to your situation. Work your own numbers first.
Google Ads for search intent (the safest bet)
If someone is actively searching for what you sell-“project management software for consultants” or “invoice automation SaaS”-you should be in front of them. Google Search campaigns have the highest intent and usually the fastest feedback loop.
The practical setup:
- Start with 5-10 high-intent keywords (not keywords with 10,000 monthly searches; aim for 50-200 per keyword in your region).
- Set a daily budget of AUD 30-50 and let it run for 2-3 weeks before making changes.
- Expect a cost-per-click of AUD 1-5 depending on your industry. Highly competitive verticals (finance, legal) run higher.
- Track conversions properly. This is non-negotiable. If you don’t know how many people filled out your form or started a trial, you can’t measure anything.
- Test 3-4 ad headlines and descriptions. Refresh them every 2-3 weeks or when click-through rate drops below 2%.
Google Search rewards relevance. If your ad, landing page, and keyword are aligned, your cost per acquisition drops. Misalignment kills spend fast. Run a test campaign at AUD 30/day for two weeks before scaling to AUD 100+/day. Real feedback will emerge in that timeframe.
LinkedIn for B2B: slower, but persistent
LinkedIn ads cost roughly 3-5x more per click than Google Search, but the audience is cleaner for most B2B software. If you sell to finance teams, HR teams, or operations managers, LinkedIn is worth testing after you’ve validated Google.
The catch: LinkedIn requires patience. A typical early-stage B2B SaaS might see:
- Cost per click: AUD 2-8
- Cost per conversion: AUD 150-400 (heavily dependent on offer and targeting)
- Feedback loop: 3-4 weeks before statistical significance
Start with a AUD 40/day budget and audience targeting based on job title, company size, and industry. Avoid broad targeting. A campaign to “HR managers in Australia” will spend fast with poor results. A campaign to “HR managers at companies with 20-500 employees in professional services” will move slower but convert harder.
LinkedIn works best when you have:
- A clear value prop that survives a 150-character ad copy.
- A landing page that speaks to the specific job title you’re targeting.
- Proof (testimonial, case study, or metric) that makes the offer feel credible.
If you’re still refining product messaging, LinkedIn can wait. Run it in month 2 or 3, not month 1.
What to avoid in the first 60 days
Facebook and Instagram: These work brilliantly for B2C (fitness, e-commerce, health). They’re weak for most B2B SaaS unless your product is consumer-facing or you have extremely strong brand recognition. You’ll burn AUD 5,000 with minimal traction.
YouTube ads: Expensive, long feedback loop, hard to attribute. Skip until you’re already spending AUD 500+ per day on Google and LinkedIn.
Broad keyword campaigns: “Business software” or “AI tools” will cost you AUD 5-15 per click with near-zero conversion rate. Target intent ruthlessly.
Unvalidated landing pages: If your landing page doesn’t have clear value prop, call-to-action, and a way to capture leads or signups, paid ads will just amplify your lack of clarity. Don’t buy traffic to a bad page.
Retargeting too early: Retargeting works, but only after you have enough volume and historical data (usually 500+ visits/month). In month 1, spend on acquisition, not retention.
The realistic spend timeline
Here’s what a sensible early-stage SaaS paid ads budget looks like:
Month 1: AUD 30-50/day on Google Search only. Goal: validate CAC. Budget = AUD 1,000-1,500.
Month 2: Scale Google to AUD 80-120/day if CAC is acceptable. Add AUD 40/day to LinkedIn if B2B. Budget = AUD 3,500-4,500.
Month 3: Scale both channels if working. Test one new channel (YouTube, more LinkedIn segments) at AUD 30/day. Budget = AUD 4,500-6,000.
Total spend across three months: AUD 9,000-12,000. At that spend level, you’ll have real data on whether paid ads make sense for your business.
If your CAC exceeds your target 2-3 months in, kill the channel and pivot. Don’t throw good money after bad hoping next month is different. The data is usually stable by week 3.
Measurement: the part that actually matters
All of this is fiction if you can’t track which ads led to signups or customers. Use Google Analytics 4 (free) and connect it to your ads accounts. Set up conversion tracking for trial signups, demo requests, or paid subscriptions-depending on your model.
Check performance every 3-5 days. Look for:
- Cost per conversion trending up or down?
- Which keywords or audiences are converting?
- Is your CAC trending toward your target?
Don’t obsess over vanity metrics (impressions, reach). Focus on cost per lead and cost per customer. Everything else is noise.
When to call in help
If you’ve run AUD 3,000-5,000 across Google and LinkedIn, documented your CAC, and the unit economics work-or you know they don’t-you have real evidence to build on. That’s the right time to talk to Amora about your build if you want to scale ads as part of a broader growth strategy, or double down on optimisation if you’re running them yourself.
The founders who succeed with early-stage paid ads aren’t the ones with the biggest budgets. They’re the ones who measure obsessively, kill what doesn’t work fast, and scale what does. Start small, stay disciplined, and let the data guide your spend.
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