Why your Google Ads cost per lead keeps climbing

We audit somewhere between three and five Google Ads accounts a month. The same six problems account for most of the wasted spend, and none of them are hard to fix.

1. Broad match with no guardrails

Google will tell you broad match plus Smart Bidding is the modern way to run search. That is true only when you have enough conversion data for the algorithm to learn from — realistically 30+ conversions a month. Below that threshold, broad match spends your budget exploring, and exploration is expensive.

If you are under that volume, start with phrase and exact match. Add broad only once the conversion data is there to steer it.

2. A negative keyword list that stopped growing

Open the search terms report for the last 90 days and sort by cost. Almost every account has a page of queries that were never going to convert: "free", "jobs", "salary", "how to do it yourself", competitor brand names you cannot serve.

This is the single highest-return hour you will spend in the account. We routinely find 15–25% of spend going to search terms the business would never want to pay for.

3. Conversion tracking that is quietly broken

This is the one that hurts most, because everything downstream depends on it. Common failures: the thank-you page tag fires on page load and also on refresh, so conversions are double counted. Or form submissions are tracked but phone calls are not, so half your leads are invisible and the algorithm optimises toward the wrong half.

Test it yourself. Submit your own form. Call your own number. Check whether both appear in the account within 24 hours. If they do not, pause everything else and fix this first — no other optimisation matters while the feedback loop is wrong.

4. Counting the wrong thing as a conversion

If "Page view of contact page" or "Time on site over 60 seconds" is set as a primary conversion, Smart Bidding is optimising for browsing, not buying. Only genuine business outcomes should be primary conversions. Everything else belongs in the secondary column where you can watch it without letting it steer bids.

5. Sending paid traffic to your homepage

Someone searching "emergency plumber South Delhi" who lands on a homepage with six navigation options has to work out where to go next. Most will not. A dedicated landing page that answers the exact query, with one clear action, routinely halves cost per lead.

You do not need twenty landing pages. You need one per major service, and they can share a template.

6. Nobody is watching the auction

Costs climb when competitors enter. If your cost per click rose 40% over six months, check the auction insights report before assuming you did something wrong. Sometimes the correct response is not to optimise harder but to shift budget to a channel where you are not bidding against three funded competitors.

What good looks like

A healthy account, in our experience, has: conversion tracking you have personally tested, a negative list reviewed monthly, a landing page per major service, and a cost per lead you can state from memory. If you cannot state your cost per lead, that is the place to start.

Nikhil Menon

Head of Marketing at Corewebbers, New Delhi. Google Ads & Meta certified. Has managed over ₹40 crore in ad spend for Indian brands.

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