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Google Ads Budget Planning: A Guide for eCommerce

Anirban Sen

Updated: 6 days ago

  • Start Small: New to ads? Begin with a $100 daily budget to gather data. Established businesses often start with $3,000/month.
  • Allocate Wisely: Dedicate 10-20% of your monthly revenue to marketing. Focus 70% on top-performing campaigns, 20% on new opportunities, and 10% on experiments.
  • Track Metrics: Watch key metrics like CTR (>4.99%), CPC (<$1.79), and ROAS to assess performance and adjust spending.
  • Avoid Costly Mistakes: Fix poor conversion tracking, optimize for mobile, and prepare for seasonal trends.
  • Use Tools: Leverage tools like Google’s Performance Planner, Keyword Planner, and Analytics to refine your strategy.

Key Tip: Retaining existing customers is up to 5x cheaper than acquiring new ones. Balance your budget between acquisition and retention for sustainable growth.

Ready to scale your campaigns? Dive into the full guide for actionable strategies and tools to maximize your ad spend.


Google Ads Budget Basics for eCommerce

How to Set Clear Budget Goals

To succeed with Google Ads in eCommerce, start by setting clear and realistic budget goals.

If you're new to Google Ads, a $100 daily budget is a good starting point for testing and gathering data. For more established businesses, beginning with a $3,000 monthly budget is common. This level of investment provides enough data to make informed decisions and optimizations.

"Google says their ads bring in an average ROI of 800% -- so for every $1 spent, companies get $8 in profit."

Here’s how to plan your budget effectively:

  • Set Revenue and Marketing Targets: Determine your monthly revenue goals and allocate 10-20% of that revenue for marketing. For instance, if your goal is $50,000 in monthly revenue, your marketing budget would range between $5,000 and $10,000.
  • Align with Profit Margins: Make sure your cost-per-acquisition (CPA) targets align with your product margins. Adjust your ad budget based on the expected returns, ensuring your ad spend supports your profit goals.

Once you’ve defined your financial targets, it’s time to understand the factors that influence your ad spend.


What Affects Your Ad Budget

Several factors play a role in determining your Google Ads budget:

  • Industry Competition: Costs can vary widely by industry. For example, electronics have an average cost-per-click (CPC) of around $0.68, while online education can climb to $9.95. Research your industry benchmarks to set realistic expectations.
  • Seasonal Trends: Adjust your budget based on shopping seasons or industry-specific peaks. Increase spending during high-demand periods and scale back during slower times to align with consumer behavior.
  • Quality Score Impact: A higher Quality Score can lower your costs. Focus on:
    • Using relevant, high-intent keywords
    • Writing ad copy that matches user intent
    • Ensuring landing pages load quickly
    • Including clear calls-to-action
  • Geographic Targeting: Use performance data to allocate your budget effectively across regions. Invest more in high-performing areas while testing new markets strategically.

Making Data-Backed Budget Decisions


Key Performance Metrics to Track

To make smarter budget decisions, it's crucial to keep an eye on the right metrics. For example, the median conversion rate for Google Ads campaigns is 4.61%, with a typical cost per conversion of $34.61.

Here are some key metrics you should track daily:

Metric

Target Range

Why It Matters

Click-Through Rate (CTR)

> 4.99%

Indicates how engaging and relevant your ads are

Cost Per Click (CPC)

< $1.79

Helps manage spending effectively

Conversion Rate (CVR)

> 4.61%

Reflects how well your ads drive sales

Return on Ad Spend (ROAS)

Industry-specific

Shows profitability of your campaigns

"For our clients the KPIs are pretty simple: It's leads, revenue generated, and Cost Per Acquisition. Our clients are typically local, service-based businesses and thus don't care too much about brand awareness or percentages. The marketing dollars need to translate to top line revenue, and so it's our job to help our clients connect the dots to that in our reporting."– Lane Rizzardini, Co-Owner, Marion Relationship Marketing

Using these metrics, you can better understand which strategies are working and make informed adjustments.


Finding Your Best-Performing Products

Once you have a handle on your metrics, the next step is to identify which products are driving the most success. Shifting your budget toward these top performers can boost your overall returns.

Here’s how to pinpoint your winners:

  • Review historical sales data using Google Analytics to identify products with consistent performance.
  • Track product-specific ROAS to see which items deliver the best returns.
  • Use custom labels in product feeds to highlight and monitor high-margin products.

For instance, Inflow helped their clients achieve a 76% increase in PPC revenue by focusing on best-selling products and leveraging Performance Max campaigns.


Budget Planning Tools and Features

To fine-tune your budget strategy, take advantage of tools designed to improve performance and efficiency.

Some must-use tools include:

  1. Performance PlannerThis tool helps you estimate clicks, conversions, and costs before making budget adjustments. It’s particularly useful for reallocating spend across multiple campaigns.
  2. Google AnalyticsMcDonald's Hong Kong used Google Analytics 4 to optimize campaigns, resulting in a 550% increase in in-app orders.
  3. Keyword PlannerBuild targeted keyword lists and get bid estimates to refine your campaign strategy.
"Google Analytics allows us to look at our data across platforms - web and app - to understand the full journey of our users. We've been able to cut our reporting time by 50%."– Sara Swaney, Director of Advancement, 412 Food Rescue

Keep an eye on these tools using the Google Ads Mobile App for quick adjustments. Regularly analyzing your data ensures you’re allocating your budget effectively and getting the most out of your campaigns.


How to Run Google Ads on a Small Budget (eCommerce)


Budget Distribution Across Campaign Types

Using data-driven insights, it's time to allocate your budget wisely across different campaign types.


Search vs Shopping vs Display Budgets

Proper budget allocation is key to boosting ROI and minimizing wasted spend. Studies show that the average wasted ad spend is a staggering 75.80%.

Campaign Focus

Allocation

Best Used For

Top Performers

70%

High-performing campaigns with proven ROAS

New Opportunities

20%

Testing and scaling potential winners

Experimental

10%

Brand awareness and trying new campaign types

Match your campaign types with the customer journey stages:

  • Awareness: Leverage Display and Discovery ads for broad reach.
  • Consideration: Use Shopping ads and generic search terms.
  • Conversion: Focus on branded search and remarketing efforts.
"When deciding where to allocate your marketing spend, you need certainty when it comes to advertising in the right places to get the best return on your investment." - BOSCO™

Holiday and Peak Season Planning

Adjusting your budgets during peak seasons can make a big difference. In 2023, eight December days outperformed Cyber Monday in spending.

  • Pre-Season Preparation: Boost campaign budgets 4–6 weeks before peak seasons and remove budget caps to handle demand surges.
  • Holiday Shopping Trends: With 34% of shoppers starting holiday purchases as early as July, extend seasonal campaigns to cater to early buyers. Keep funds ready for last-minute shoppers.
  • Mobile Optimization: Over 70% of shoppers used mobile devices during Black Friday. Ensure your campaigns are mobile-friendly and allocate budgets accordingly.
"To avoid missing out on unexpected spikes in demand, consider removing budget caps, and stay flexible using recommendations to optimize your budget. For short-term sales events, apply seasonality adjustments if you expect to see dramatic shifts in conversion rates." - Jyotika Prasad, Senior Director, Retail Ads

Brand vs Non-Brand Keywords

Balancing branded and non-branded keywords is crucial for campaign success. Research shows that branded keywords in top SERP results achieve over twice the CTR compared to non-branded terms.

Keyword Type

Average ROAS

Average CPC

Branded

1,299%

$5.50

Non-Branded

68%

$21.10

Swimsuits Direct provides a great example of this balance. By using non-branded keywords for growth and branded terms for remarketing, they boosted their ROAS from 250% to over 400%.

"While it's still important to run brand campaigns for defensive purposes (if you aren't bidding on your own terms your competitors gladly will), it is important to focus the majority of your energies on non-branded campaigns. That is ultimately how you go after new opportunities and grab more market share." - Steven Dang, VP of growth and strategy at HawkSEM

Keep branded and non-branded campaigns separate to better track performance and control your budget. This approach allows for precise optimization, reduces budget waste, and improves overall campaign results. Use these insights to refine your strategy further.


Improving ROI and Campaign Growth


Cutting Unnecessary Spending

Optimizing your budget starts with cutting out wasteful spending. For instance, goinflow.com reported a case where a client lost $300,000 in just three months because Google's algorithms targeted irrelevant keywords.

You can avoid similar losses by implementing these strategies:

Strategy

Impact

How to Apply

Negative Keyword Sculpting

Filters out irrelevant clicks

Add terms to block unwanted traffic

Keyword Refinement

Reduces broad-match inefficiency

Focus on specific-phrase and exact-match keywords

Quality Score Optimization

Lowers cost per click

Align keywords with ad content and landing pages

"For Search Network campaigns, reviewing the search terms associated with keyword clicks can help to reduce unnecessary or wasted spend." - Ian Dawson, HawkSEM Lead Strategist

Once you've minimized waste, you can redirect those saved resources into campaigns that are already performing well.


Growing High-Performance Campaigns

After trimming unnecessary costs, it's time to scale campaigns that are delivering strong ROAS. A major opportunity lies in addressing lost impression share - ads that aren't displayed due to budget constraints or low ad rank.

Here’s how to grow your top-performing campaigns:

  • Budget Allocation: Gradually increase budgets for campaigns with proven ROAS.
  • Automated Bidding: Use Google Ads' machine learning to adjust bids during high-conversion periods.
  • Quality Score Improvements: Enhance ad relevance and landing page experience to lower CPC while maintaining strong visibility.
"Budgeting should reflect a positive return on your ad spend, so reviewing your conversion value will help make sure your budget is appropriate to allow for a positive return." - Ian Dawson, Lead Strategist, HawkSEM

Scaling these campaigns requires constant adjustments to budgets, especially as your business evolves.


Budget Updates for Business Changes

To keep up with shifting business needs, regularly update your budgets based on campaign performance and market conditions. Google offers flexible daily and shared budget options with built-in spending controls:

Budget Type

Daily Limit

Monthly Limit

Standard Campaign

2x daily budget

30.4x daily budget

Shared Budget

Combines campaigns' limits

Monthly aggregate

For best results:

  • Monitor your campaigns daily.
  • Set up automated alerts for performance changes.
  • Adjust budgets to accommodate seasonal trends.

Google's "overdelivery" feature also helps capture high-traffic opportunities by spending more on busy days while staying within your monthly budget. This ensures you can maximize conversions during peak periods without overspending.


Conclusion: Creating Your Budget Plan

Set up a data-driven Google Ads budget plan to aim for the average 800% ROI - earning $8 for every $1 spent. This plan builds on the strategies and insights covered earlier.

Component

Actions

Expected Outcome

Performance Tracking

Monitor CTR, CPC, and conversion rates

Spot areas for improvement

Budget Flexibility

Adjust for seasonality and automate rules

Optimize spending

Quality Optimization

Enhance ad relevance and landing pages

Reduce costs and boost conversions


Key Steps to Get Started

Start small. Allocate modest budgets to test campaigns and focus on high-intent keywords that signal purchase readiness. Use geo-targeting to channel your budget into the most profitable regions.

"It's important to have an agile approach when it comes to eCommerce marketing; things change quickly and the search landscape is constantly evolving. You need to always be open to new opportunities and test everything!"– Shaun Elley, Alumni, Inflow

Maintain brand visibility by allocating budgets strategically, ensuring your ads remain active even during slower periods. This helps support steady growth. During peak seasons, tap into automated rules to seize higher conversion opportunities.


Advanced Tips for Refinement

  • Explore multi-channel strategies to amplify your reach.
  • Personalize ads based on user behavior and intent.
  • Use remarketing to re-engage previous visitors.
  • Control your messaging with carefully chosen keywords.
"Managing budgets in Google Ads isn't just about numbers and figures. It's a process that involves strategic thinking, continuous monitoring, and timely adjustments."– Vimal Bharadwaj, Content Marketing Manager, Optmyzr

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