Plan your Google Ads budget around what your business can afford, the estimated cost of relevant clicks and the value of a suitable customer enquiry. There is no single amount that fits every business in Germany. Your service, target area, margins and ability to turn enquiries into customers all influence a workable starting figure.

This guide focuses on small businesses seeking enquiries through search campaigns using average daily budgets. The calculations below are planning examples, not German market benchmarks or predictions.

Consider a small IT support company seeking ongoing business contracts. Its owner needs to decide how much to commit before knowing whether the advertising will attract suitable enquiries. Separating affordable spending from estimated results gives the owner a clearer basis for that decision.

Work Out What Your Business Can Afford

Start with an amount the business can fund while meeting its existing commitments. Avoid depending on unproven advertising returns to pay bills that are already due.

Separate your available funds into:

• Advertising spend: the amount allocated to Google Ads.
• Initial preparation: campaign setup, landing-page changes and measurement configuration.
• Ongoing work: campaign management, reporting, tools and handling enquiries.

Obtain quotes where you need outside support. Include internal staff time when assessing the campaign’s overall cost, even if it does not produce a separate invoice.

For the IT company, a new contract could involve onboarding work before the customer’s first payment arrives. The owner therefore checks delivery costs and payment timing before approving advertising. Using financial data to make spending decisions helps connect the campaign allowance with available cash and expected profitability.

Set a review date and decide how much the business can commit before reassessing. Give the initial campaign a defined service, target area and spending allowance.

Estimate Click Costs for Your Service and Target Area

Build your estimate around searches connected to the service you actually sell. A country-wide advertising average cannot tell a local IT company what suitable traffic will cost.

Google’s Keyword Planner can help research keywords and estimate campaign performance. Use settings that reflect your intended location, language and Search Network selection. 

Follow these steps:

1. Describe the offer precisely. For example, ongoing IT support for small businesses.
2. Identify searches that could express that need. German phrases such as “IT Betreuung für Unternehmen” are starting points to investigate, not verified high-volume keywords.
3. Select the area you can serve. Use your actual service area when assessing demand.
4. Review relevance before volume. Separate business support searches from home computer repairs, jobs or free advice.
5. Record estimated clicks, cost and the settings used. This makes later comparisons more useful.

Treat the figures as estimates. Google explains that forecasts consider factors including bids, budgets, seasonality and historical ad quality. New advertisers rely more heavily on broader historical data, and forecasts for small geographical areas can be less accurate.

Historical top-of-page bid ranges also differ from a forecast of your actual average cost per click. Google’s forecast guidance explains these distinctions.

For the IT company, the useful question is whether relevant local demand could support a worthwhile test. A cheaper click has limited value if it comes from someone seeking a service the company does not provide.

Calculate a Starting Budget from Expected Enquiries

Connect advertising spend with possible outcomes using three calculations:

Estimated clicks = advertising spend ÷ average cost per click

Estimated enquiries = clicks × percentage of clicks resulting in an enquiry

Estimated qualified enquiries = enquiries × percentage of enquiries meeting your criteria

Use percentages as decimals when calculating: 5% becomes 0.05.

Each input should come from relevant business evidence where available. Otherwise, label it as an assumption and test more than one possibility. Replace assumptions as reliable campaign evidence becomes available.

Define What Counts as a Qualified Enquiry

Agree what a useful enquiry looks like before counting campaign results.

For the hypothetical IT company, it might be an enquiry from a business within its service area that needs ongoing support and fits its delivery capacity. A home laptop repair request would not meet those criteria.

A form submission alone does not establish commercial value. Record whether the enquiry is suitable, whether a proposal follows and whether it becomes a customer.

Keep three measures separate: cost per enquiry, cost per qualified enquiry and cost per acquired customer. They answer different questions about campaign performance.

Compare Two Hypothetical Spending Scenarios

The following figures are hypothetical and used only to demonstrate the calculation. Neither column represents typical results in Germany.

The comparison shows how the same spend can produce a different cost per suitable enquiry when click costs and response rates change. Both scenarios assume the full advertising allowance is spent.

Neither result establishes profitability. The company still needs to win customers and cover delivery, setup and management costs.

To work backwards from an enquiry goal, use:

Required advertising spend = desired qualified enquiries ÷ qualification rate ÷ enquiry rate × average cost per click

Under Scenario A’s assumptions:

5 ÷ 0.50 ÷ 0.05 × €3 = €600

That arithmetic does not prove that sufficient demand exists or that the assumed rates will occur.

Compare the result with your affordable allowance. If the calculated requirement is too high, reconsider the scope or the proposed test before committing funds.

Keeping the budget separate from the forecast is useful here: one records the spending plan; the other estimates what might happen.

Understand Google’s Daily and Monthly Spending Limits

An average daily budget is not a fixed daily spending ceiling.

For most campaigns, Google states that the daily billing limit is twice the average daily budget, while the monthly limit is 30.4 times that budget. The full-month calculation assumes the budget remains unchanged; starting partway through a month or changing the budget affects the calculation. Google’s spending-limit guidance sets out the rules and exceptions. 

Convert a Monthly Allowance into an Average Daily Budget

For an unchanged budget covering a full calendar month:

Average daily budget = monthly advertising allowance ÷ 30.4

For example, a €608 monthly allowance corresponds to a €20 average daily budget. For a Search campaign under the standard limits, that allows daily billed spending of up to €40 while retaining the €608 monthly limit.

These figures describe advertising spending limits. They exclude agency fees, website work and other project expenses. They also do not mean Google will necessarily use the whole allowance.

If you run several campaigns with separate budgets, check their combined potential spending against the amount the business has approved.

Account for Budget Changes and Ad Scheduling

Budget edits can change your spending limits. Google explains that the highest average daily budget selected during a day affects that day’s limit.

Following a budget change, the monthly calculation accounts for spending already incurred and the new daily budget over the remaining calendar days. Lowering the setting does not reverse earlier spending. Consult how budget changes take effect before making adjustments. 

Scheduling also needs attention. Google’s change effective from 1 June 2026 allows eligible campaigns, including Search, to pace towards the full monthly limit even when particular weekdays are excluded.

Switching weekends off therefore does not automatically reduce monthly spending in proportion to the days removed. Excluded days remain excluded, and daily limits still constrain spending. The change concerns excluded days rather than schedules that only restrict hours within a day. Google provides details in its ad-scheduling budget guidance. support.google.com

For the IT company, weekday-only advertising should reflect when enquiries are useful and can be handled. The budget itself still needs to match the approved spending allowance.

Decide When to Adjust Your Budget

Review whether spending is producing suitable opportunities before increasing it. A campaign can generate activity while failing to attract the customers the business needs.

Use Google Ads’ budget report to examine spending and forecasts for the month. Combine that information with your own enquiry and sales records.

Check four things:

• Spending: Is the projected amount within the approved allowance?
• Relevance: Are enquiries about the service and area you intended to target?
• Measurement: Do recorded enquiries correspond to real submissions or calls?
• Commercial progress: Are suitable enquiries moving towards proposals and sales?

If the IT company receives home repair enquiries, investigate search relevance and the landing page’s message before expanding the budget. If suitable prospects submit forms but receive slow replies, examine the follow-up process.

Fix broken forms or measurement problems promptly. Allow time for the normal sales process when judging commercial results, and recognise that a small number of enquiries provides limited evidence.

Increase spending only when the business can afford the additional commitment and the evidence supports doing so. Record what changed and why. Where practical, avoid changing the offer, targeting, landing page and budget simultaneously, because that makes subsequent results harder to interpret.

Build the Skills to Plan and Assess Campaigns

If you will plan campaigns and assess their results, GCI’s Certified Digital Marketing Specialist (SEO, SEM & Analytics) may be relevant. Its published curriculum includes Google Ads, conversion-focused landing pages, measurement strategy and Google Analytics 4, alongside SEO and marketing privacy topics. These areas connect campaign spending with how visitors respond and how results are assessed.

Review the course syllabus to check whether the coverage matches your responsibilities and current knowledge. Before enrolling, also check the language requirements: the course page specifies good German language skills.