One of the first questions e-commerce business owners ask before launching a campaign is: How much should I spend on Google Ads?
There is no single budget that works for every online store. Your ideal budget depends on your products, profit margins, competition, average order value, and growth goals.
The good news is that Google Ads can be scaled gradually. You can start with a manageable budget, collect performance data, and increase your investment as you identify what works.
Start With Your Profit Margins
Before choosing a budget for Google Ads, understand how much you can afford to spend to acquire a customer.
For example, if you sell a product for $150 but your costs leave you with a small profit, spending $100 to acquire one customer may not be sustainable.
Your advertising budget should be based on your margins and customer value—not simply what your competitors are spending.
Consider Your Average Order Value
Your average order value (AOV) is another important factor when planning your Google Ads budget.
If customers typically spend $200 per order, you may have more room to acquire customers through paid advertising than a business selling $20 products.
Consider:
- Average order value
- Gross profit per order
- Customer lifetime value
- Target cost per acquisition
- Expected conversion rate
These numbers can help you establish a realistic advertising budget.
Start With Enough Data
A very small budget can make it difficult to collect enough conversion data.
That doesn’t mean you need to spend thousands of dollars immediately. Instead, choose a budget that allows your campaigns to generate meaningful traffic and conversions while remaining financially comfortable for your business.
Once you have enough data, you can identify your strongest products, search terms, and campaigns.
Focus on Your Best Products
You don’t necessarily need to advertise every product in your store.
Start by identifying products with:
- Strong profit margins
- Consistent demand
- Competitive pricing
- Good conversion rates
- Reliable inventory
Putting more of your Google Ads budget behind proven products can help you get more from your advertising spend.
Don’t Forget Your Product Feed
For e-commerce businesses using Shopping campaigns or Performance Max, your product feed is extremely important.
Your product information should be accurate and complete, including:
- Product titles
- Descriptions
- Images
- Prices
- Availability
- Product categories
A well-optimised feed gives Google better information about your products and helps match them with relevant searches.
Monitor Your Return on Ad Spend
Your Google Ads budget should never be evaluated on clicks alone.
Important e-commerce metrics include:
- Conversion rate
- Cost per conversion
- Average order value
- Revenue
- Return on ad spend (ROAS)
- Profitability
For example, increasing your budget by 50% isn’t necessarily a success if your revenue increases by only 10% and profitability falls.
Scale Your Budget Gradually
Once your campaigns consistently generate profitable sales, you can begin increasing your budget.
Rather than making large changes overnight, scale gradually and monitor how performance responds. This gives you a better understanding of how additional spending affects sales and profitability.
Successful Google Ads campaigns are built through continuous testing, optimisation, and careful budget management.
So, How Much Do You Need?
There isn’t a universal number for every New Zealand e-commerce business.
A suitable starting budget depends on your product prices, margins, competition, conversion rate, and business goals. The important thing is to start with a budget you can sustain, measure the results, and scale when the data supports it.
At Hands Free Marketing, we help businesses across New Zealand manage Google Ads campaigns with a focus on profitable growth. Whether you’re launching your first Shopping campaign or looking to scale an established e-commerce store, the goal is to make your advertising budget work harder.
If you want clarity instead of guesswork, get in touch.
👉 Book your free 15-minute consult
📞 027 590 9421
📧 jevon@handsfreemarketing.com
🌐 Web Design Hawke’s Bay