01The Direct Answer
How much should an industrial company invest per month in Google Ads?
Direct Answer
The amount that produces the number of opportunities your sales target requires — a calculation, not a percentage of revenue or a fixed monthly figure.
A rule like "invest X% of revenue" or "spend R$ Y per month" ignores three things that differ from company to company: how many orders you need this month, what share of opportunities your sales team actually closes, and what a qualified opportunity costs in your specific account and sector. Skip the rule and calculate directly from those three numbers instead.
02Why There Is No Universal Rule
Cost per lead already varies by sector, before your account even enters the auction
WordStream's Google Ads Benchmarks 2026 report, built from 13,474 US search campaigns across 23 sectors, puts the Industrial & Commercial category at an average CPC of US$ 5.87, a conversion rate of 8.20% and a cost per lead of US$ 75.19 — all measurably different from the report's overall average of US$ 5.42 CPC, 8.18% conversion and US$ 66.69 per lead. If two accounts in different sectors applied the same percentage-of-revenue rule, they would end up with wildly different numbers of leads for the same spend, simply because the sector-level auction price differs.
Roberto Wydra, founder of RudekWydra, argues that a budget rule borrowed from a different sector or a different sales cycle length is not conservative — it is just imprecise in a direction nobody checked.
03The Calculation Method
Four numbers, in order, produce the budget
The Method
1. Set the order target
How many new orders does this channel need to originate in the period, according to the sales plan?
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2. Divide by the close rate
What share of qualified opportunities does sales actually close? Order target ÷ close rate = opportunities needed.
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3. Multiply by cost per opportunity
Opportunities needed × your real cost per qualified opportunity = the budget required for the channel to hit the target.
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4. Sanity-check against capacity
A number the account cannot spend efficiently at current reach is a signal to phase the increase, not to reject the calculation.
The one input this method depends on that most accounts do not have ready is real cost per qualified opportunity, which is calculated separately in this cluster.
04When to Revisit the Number
The calculation has an expiration date
Every input in this method can move independently: the order target changes with the sales plan, the close rate changes as the sales team or the product mix changes, and cost per opportunity moves with the auction and with the account's own targeting quality. Recalculating monthly, using the same real numbers instead of last year's budget plus inflation, is what keeps the figure attached to reality instead of becoming its own kind of rule of thumb.
05FAQ
FAQ
How much should an industrial company invest per month in Google Ads?
Calculate it from your own numbers: divide your order target by your sales close rate to get the opportunities needed, then multiply by your real cost per qualified opportunity. There is no fixed percentage of revenue or monthly figure that fits every account, because cost per lead already varies by sector.
Is there an industry-standard percentage of revenue to spend on Google Ads?
This hub does not use one, because a fixed percentage ignores the sales target, the close rate and the real cost per opportunity, all of which differ from company to company. WordStream's Google Ads Benchmarks 2026 shows even average cost per lead differing by sector — US$ 75.19 for Industrial & Commercial against US$ 66.69 overall — which is one of the reasons a single percentage cannot fit every account.
What if I do not know my real cost per opportunity yet?
Calculate it first — it is the one input this method depends on that most accounts do not have ready, built from total spend divided by the number of leads your sales criteria accepted as a real opportunity, not by every form submitted.
How does the close rate affect the budget calculation?
It sets how many opportunities are needed to reach the order target: order target divided by close rate equals opportunities needed. A lower close rate means more opportunities, and therefore more budget, are required for the same number of orders.
Why does WordStream show a different cost per lead for the Industrial & Commercial category?
According to the WordStream 2026 report, which groups campaigns by sector, Industrial & Commercial averages a CPC of US$ 5.87, an 8.20% conversion rate and a US$ 75.19 cost per lead, against overall averages of US$ 5.42 CPC, 8.18% conversion and US$ 66.69 per lead. Auction competition and buyer behavior both differ by sector, and the average reflects that.
Should I recalculate the budget every month?
Yes. Every input — the order target, the close rate, the cost per opportunity — can shift independently, and recalculating with current numbers is what keeps the budget attached to reality instead of becoming last year's figure with inflation added.
What if the calculated budget is higher than what the account can spend efficiently?
That mismatch is a signal to phase the increase and expand reach gradually, not a reason to discard the calculation. Spending faster than the account's targeting can absorb tends to raise cost per opportunity, which shows up in the next month's recalculation.
Does this method apply to a new account with no historical data?
A new account can use a sector benchmark like WordStream's Industrial & Commercial average as a starting estimate for cost per opportunity, then replace it with the account's own number as soon as enough real data accumulates, typically after the first full sales cycle.
Calculate the budget your sales target actually requires
A budget review runs this method against your own order target, close rate and real cost per opportunity, instead of applying a borrowed percentage.
