Click-through rate (CTR) is the percentage of people who see your ad and click on it. For an accounting firm's Google Ads campaign, a higher CTR means more visits from the same number of impressions — reducing your effective cost per visitor and improving your Quality Score, which lowers cost per click. The two primary levers for improving CTR are ad copy quality and ad relevance to the keyword.
What a good CTR looks like
For Search campaigns targeting accounting firm keywords:
- Below 2%: your ad copy is likely too generic, or your ad is consistently appearing in low positions.
- 2 to 5%: reasonable performance for local professional services keywords.
- Above 5%: strong CTR — your copy is specific and relevant to the searcher's query.
- Above 10%: excellent, typically achieved on branded or very narrow exact match keywords.
These are rough benchmarks. CTR varies significantly by keyword intent, ad position, and competition level. A niche keyword with very few competing ads will naturally achieve higher CTR than a broad term with many advertisers. Compare your CTR to your own account average rather than against a fixed benchmark.
The fastest CTR improvements
Match keyword in headline
If someone searches "sole trader accountant Birmingham" and your headline says "Professional Accounting Services", there is a mismatch. If your headline says "Sole Trader Accountant Birmingham", the match is immediate and the CTR will be higher.
Responsive search ads allow Google to test headline combinations. Ensure at least one of your 15 headlines precisely mirrors your primary keyword. Google often selects the most relevant headline for a given query — the more keyword-rich headlines you provide, the more often a closely matched headline will be shown.
Use specific language over generic language
Generic phrases like "Professional Services", "Expert Accountants", and "Quality Service" appear in every accounting firm's ad. They tell the searcher nothing specific.
Specific phrases differentiate: "Fixed Fees from £X/Month", "IR35 Contractor Specialists", "Same-Week Appointments Available". Specificity creates relevance and curiosity.
Include a compelling call to action
"Book a Free 30-Min Call" outperforms "Contact Us Today" because it tells the searcher exactly what happens when they click. Reduce the perceived effort and risk of the action.
Use numbers where possible
"Fixed fees from £75/month" is more credible and specific than "affordable fixed fees". Numbers attract attention in a page of text.
Ad position and CTR
CTR drops sharply below position 3 in search results. An ad in position 1 might achieve a CTR of six to eight percent; the same ad in position 5 might achieve one to two percent.
If your average position is consistently low (check the Search Top IS and Search Abs Top IS metrics in your reports), improving CTR requires improving Ad Rank — which means either increasing bids or improving Quality Scores. Better ad copy improves expected CTR, which is one of the three Quality Score components, which in turn improves Ad Rank without requiring a higher bid.
Writing compelling headlines for accounting firm ads
Formula: [Problem/Service] + [Differentiator] + [Location]
| Weak headline | Stronger alternative |
|---|---|
| Professional Accountants | Sole Trader Accountant [City] |
| Tax Services Available | Self-Assessment Filed For You |
| Accounting Help | Fixed Fee — No Hourly Surprises |
| Get in Touch Today | Book a Free 30-Min Call |
| Expert Accountants | IR35 Specialists — Contractors Welcome |
The stronger alternatives are specific, relevant to the search, and either remove a concern (fixed fee, no surprises) or promise a clear benefit.
Testing ad copy systematically
Google's responsive search ads test headline and description combinations automatically and surface performance data per asset. Review the RSA asset report after four to six weeks:
- Assets marked "Best" are driving CTR — do not remove them.
- Assets marked "Poor" should be replaced with new variants.
- Test one variable at a time (headline vs headline, or description vs description) to isolate what is driving improvement.
Beyond RSA asset testing, write a second full ad per ad group after two months. Compare the two ads' CTRs and pause the underperformer. This ad-level testing gives you a clearer picture than asset-level data alone.
Extensions and CTR
Ad extensions (sitelinks, callouts, structured snippets) increase the physical size of your ad and provide additional context. Larger ads tend to achieve higher CTRs because they are more visible on the page and provide more information before the click.
Ensure you have added:
- At least four sitelinks (required for Google to show a sitelinks group).
- Six to eight callouts.
- One structured snippet (Services or similar).
- A call extension if phone enquiries are important.
Extensions only show when your ad is in a high enough position. If extensions are rarely showing, focus on improving Ad Rank first.
What not to do
Do not use clickbait: "You won't believe what HMRC is doing" is not relevant to an accounting firm and undermines professional credibility.
Do not make unverifiable claims: "UK's Best Accountants" or "Guaranteed Lowest Fees" will likely be disapproved by Google's editorial policies and damage trust with searchers even if approved.
Do not stuff headlines with keywords: "Accountant London Cheap Accountant Self Assessment London" is keyword-stuffed, looks spammy, and will achieve low CTR and low Quality Score.
Key takeaways
- The fastest CTR improvements come from matching your headline to the keyword being searched and using specific language over generic claims.
- CTR drops sharply below ad position 3 — improving Ad Rank (through Quality Score or bids) increases CTR by improving position.
- Test headlines systematically using RSA asset reports and compare full ad variants after each gets sufficient impressions.
- Extensions increase ad size and provide more information before the click, both of which tend to improve CTR.
- Avoid clickbait, unverifiable superlatives, and keyword-stuffed copy — these harm both CTR and Quality Score.
Frequently asked questions
How many impressions do we need before assessing a headline's performance?
A minimum of 200 to 500 impressions per headline before drawing conclusions. Headlines shown fewer times than this have insufficient data to distinguish performance from chance. RSA asset reports label assets as "Learning" until they have gathered enough data.
Does ad position affect CTR on mobile differently from desktop?
Yes. On mobile, the visible above-the-fold area shows fewer results, making position 1 and 2 even more dominant for CTR. Mobile CTRs for top positions are often higher than desktop equivalents. If mobile is a major share of your impressions (check the device report), prioritise ad rank for mobile users.
Can we pin a high-CTR headline to always appear in position 1?
Yes, using RSA headline pinning. This guarantees that headline always shows in position 1 — useful for your most important brand or keyword message. The tradeoff is reduced testing flexibility. Use pinning for must-show elements (like your firm name) only.
Should we use dynamic keyword insertion to match headlines to search queries?
Dynamic keyword insertion (DKI) automatically inserts the triggering search query into your headline. It can increase CTR by creating an exact keyword match appearance, but it can also produce awkward headlines if the search query does not naturally read as a headline. Test DKI carefully and review actual ad appearances via the ad preview tool.
How long should we run an underperforming ad before pausing it?
Give underperforming ads at least four to six weeks and 200 to 500 impressions before pausing. Ads with fewer impressions than this have not been tested sufficiently. If after six weeks an ad has significantly lower CTR than the control ad, pause it and replace it with a new variant.