How do you know if your Google Ads agency is actually delivering value? Run a 90-minute structured audit against the 15 red flags below, score each 0-7 points, and arrive at a /100 grade that tells you whether to retain, renegotiate, or switch. The framework is designed to be independent of agency self-reporting — agency-supplied dashboards routinely conceal exactly the problems you most need to find.
This guide is the playbook 2026 advertisers use to grade incumbent agencies. We cover all 15 red flags, the scoring framework, and the three paths (retain / renegotiate / switch) the audit unlocks. If you'd rather have an experienced auditor run the full 5-axis review with read-only MCC access, request our free 5-axis Google Ads audit — same framework, deeper drill-down.
Updated 2026-05-09 with current Performance Max, Smart Bidding, and Consent Mode v2 audit checkpoints.
- 15 red flags organized in 3 categories: hygiene, bidding, tracking.
- Score 0-7 per flag for a maximum of 105 points (rounded to /100).
- Below 60/100 = change agency. 60-79 = renegotiate. 80+ = retain.
- Time required: 90 minutes self-conducted, or 8-15 hours professional audit.
- Key signal: agency cannot grant read-only MCC access. That alone is grounds for change.
Why audit your agency now
Three forces make 2026 the year of the agency audit:
1. Performance Max instability. PMax has shifted Google Ads economics. Agencies that haven't adapted (no brand exclusion lists, no asset-group surgery, no incrementality measurement) are leaking 20-40% of spend. See our why PMax destroys 30% of accounts.
2. Privacy-driven attribution shifts. Consent Mode v2, server-side tracking, and the loss of third-party cookies have re-shaped what agencies need to do well. Agencies stuck on 2022 setups are reporting wrong numbers. See our server-side tracking guide.
3. AI-driven productivity divergence. Top agencies use AI tooling to deliver 2-3× the optimization velocity per strategist hour. Agencies that haven't adopted are quietly slipping behind on output quality. The audit reveals which side your agency is on.
The result: the median agency in 2026 is materially weaker than the median agency in 2022. Audit before renewal.
The 15 red flags scorecard
Red flags 1-5: account hygiene
Red flag 1 — Account ownership held by agency. You cannot log in as admin to your own Google Ads account because the agency owns the MCC and refuses to grant access. Score 0 if access is denied; 7 if you have full admin access. This is a binary signal: refusal alone is grounds for change.
Red flag 2 — No branded Search campaign protecting your name. Branded search has lower CPC, higher conversion rate, and prevents competitors from bidding on your name. Absence of a dedicated branded campaign means missed defensive coverage. Score 0 if absent, 4 if present but un-optimized, 7 if dedicated and well-managed.
Red flag 3 — Stale or absent Search Terms exclusion list. Open the Search Terms report and check for terms with under 1% conversion rate that should be negative. Quality agencies maintain a growing exclusion list; stale lists mean wasted spend on irrelevant queries. Score based on negatives added in last 90 days: 0 if none, 7 if 100+ thoughtful exclusions.
Red flag 4 — Fewer than 3 RSAs per ad group, no recent edits. Google requires 3 RSAs per ad group for proper testing. Last-edit date should be within 60 days. Score: 0 if under 3 RSAs or last edit over 180 days; 7 if 3+ RSAs and recent ongoing testing. See our full audit checklist.
Red flag 5 — Ad groups with over 20 keywords (theme bleeding). Tight ad groups (under 15 keywords, single intent theme) are still 2026 best practice for QS. Sprawling ad groups dilute relevance and Quality Score. Score: 0 if any ad group over 30 keywords; 4 if average 15-25; 7 if average under 15 with single themes.
Red flags 6-10: bidding & strategy
Red flag 6 — Performance Max running without brand exclusion. Open PMax campaigns; check whether brand exclusion list is applied. If not, PMax is eating branded search and inflating reported ROAS. Score: 0 if no exclusion; 7 if brand exclusion list active and updated quarterly.
Red flag 7 — Average CPC drifting up over 30% in 90 days. Pull 90-day CPC trend. Drifting CPC without ROAS justification is a signal of Smart Bidding mis-configuration or competitive pressure not adapted to. Score: 0 if drift over 30% un-explained; 7 if CPC stable or rising in proportion to ROAS gain.
Red flag 8 — Smart Bidding without conversion-value imports. Smart Bidding (Maximize Conversions, tROAS) needs conversion values to optimize properly. If conversion values are static or missing, Smart Bidding is half-blind. Score: 0 if no conversion values; 7 if dynamic CRM-tied values flow daily.
Red flag 9 — ROAS reported only at last-click; no branded split. Quality 2026 reporting includes: total ROAS, branded-excluded ROAS, and incrementality estimate. Last-click-only reporting hides the brand-eating problem. Score: 0 if last-click only; 4 if branded split present; 7 if incrementality measured quarterly.
Red flag 10 — PMax cannibalizing Search query share. Pull impression share for branded Search; compare to PMax brand traffic. If PMax is gaining branded traffic and Search is losing impression share, PMax is cannibalizing. Score: 0 if cannibalization observed; 7 if branded Search holds 90%+ impression share with PMax in market. See our PMax vs Search comparison.
Red flags 11-15: tracking & reporting
Red flag 11 — Conversion tracking missing 20%+ of CRM revenue. Compare Google Ads-attributed revenue to CRM-recorded revenue from Google Ads source. Gap over 20% suggests broken or partial tracking. Score: 0 if gap over 30%; 4 if 10-20%; 7 if under 10%.
Red flag 12 — No Enhanced Conversions deployment. Enhanced Conversions for Web (hashed identifiers) and Enhanced Conversions for Leads (offline upload) are 2026 baseline. Absence means 8-15% attribution loss. Score: 0 if absent; 7 if both EC modes active. See our conversion tracking guide.
Red flag 13 — No server-side GTM (advertiser over $50k/month spend). Above $50k/month spend, sGTM is the 2026 standard. Without it, attribution drifts as third-party cookies fail. Score: 0 if no sGTM; 7 if sGTM with consent-aware tag firing. See our sGTM guide.
Red flag 14 — Executive review cadence over 60 days. Quality agencies hold monthly executive reviews. Cadence over 60 days means the agency is on autopilot. Score: 0 if cadence over 90 days; 4 if 60-90 days; 7 if monthly with documented agenda.
Red flag 15 — No incrementality measurement on top 3 campaigns. Geo hold-out tests, ghost-bid experiments, or PMax exclusion tests on top campaigns confirm whether spend is incremental or substituting for organic. Score: 0 if no incrementality testing in last 12 months; 7 if quarterly hold-out experiments documented.
Scoring framework (/100)
Sum your scores across all 15 red flags. Maximum possible: 105 points. The framework converts to /100 by capping at 100.
To estimate the financial impact of the gaps your audit uncovered, run our wasted ad spend calculator, and verify Quality Score health with our Quality Score checker.
How to interpret your score
90-100 — Excellent. Your agency is among the top 15% in 2026 panel data. Retain, share findings with the agency as positive feedback, and consider a performance bonus or expanded scope.
80-89 — Strong. Your agency is performing well above average. A few specific items need improvement; document them, share at the next quarterly business review, and re-audit in 6 months.
70-79 — Adequate. Your agency is doing the basics correctly but missing meaningful upside. Renegotiate with 60-day improvement targets on the lowest-scoring red flags. Re-audit at 60 days; if no improvement, escalate.
60-69 — Concerning. Your agency has multiple gaps that are likely costing you 15-30% of spend. Issue a 30-day improvement plan; if no progress, begin termination proceedings.
Below 60 — Failing. Your agency is materially under-delivering. Begin the agency change process immediately using our switch playbook.
A score of 75 with all 7s on tracking but 0s on hygiene is functionally different from a 75 evenly distributed. The hygiene gaps mean your agency is leaking spend daily; tracking gaps mean you're flying blind. Always read the score breakdown by category, not just the total.
What to do with the audit (3 paths)
Path 1 — Retain (score 80+). Document findings, schedule a positive QBR with the agency, agree on minor improvements, renew the contract. Keep the audit on file for next year's re-evaluation.
Path 2 — Renegotiate (score 60-79). Share the audit findings with the agency in a formal meeting. Set 60-day improvement targets on lowest-scoring flags. Hold weekly check-ins during improvement window. Re-audit at 60 days.
Path 3 — Switch (score under 60). Begin transition planning. Execute the 30/60/90-day switching playbook covered in our switching guide. Critical: do not terminate before the new agency is contracted to avoid coverage gaps.
This Google Ads agency audit framework is updated quarterly by SteerAds. Last update: 2026-05-09. The 15-red-flag scorecard is based on 2025-2026 panel data from over 200 agency audits across USA, UK, FR/DE, and GCC markets.
For complementary reading, see our full Google Ads account checklist, our 10 most common Google Ads mistakes, and our agency cost benchmarks. To run the full 5-axis professional audit on your account, request our free 5-axis Google Ads audit, model the financial impact with our wasted ad spend calculator, and for enterprise multi-account governance reach out via our contact form.
Sources
Official sources consulted for this guide:
FAQ
How do I know if my Google Ads agency is doing a good job?
Run a 90-minute structured audit across 15 red flags covering account hygiene, bidding strategy, and tracking. Score each red flag 0-7 points; a passing agency scores 80+/100. Below 60/100 indicates serious deficiency justifying immediate review or change. Above 90/100 indicates a high-performing agency you should retain. The audit is independent of agency self-reporting, which is the only reliable way to evaluate performance — agency-supplied dashboards usually conceal the issues you most need to find.
What are the most common Google Ads agency red flags in 2026?
The top 5 red flags found in 2026 audits: (1) Performance Max running without brand exclusion lists (cannibalizes branded traffic); (2) drifting average CPC up over 30% in 90 days without ROAS justification; (3) vanity ROAS reporting (last-click only, no incrementality view); (4) account ownership held by agency (you cannot get admin access); (5) tracking gaps where 20%+ of conversions are unattributed. Each is documented in the 15-red-flag scorecard.
Should I tell my agency I'm auditing them?
Yes, but transparently. Frame it as an independent third-party review you commission for governance — not a hostile termination signal. Quality agencies welcome external audits; they often reveal optimization opportunities the agency has been advocating internally. Agencies that refuse to grant the auditor read-only MCC access are themselves a red flag. The audit is in writing, with documented findings, and concludes with a renewal/change/renegotiate decision.
Can I audit a Google Ads agency myself without expert help?
Partially. A non-expert account owner can identify 6-9 of the 15 red flags using the framework: ownership, billing transparency, vanity reporting, sub-3-month strategy review cadence, and obvious budget waste. The remaining 6-9 (Smart Bidding configuration, asset-group construction, Search Terms exclusions, query-level cannibalization) require an experienced auditor with read-only MCC access. SteerAds offers this as a 5-axis review.
How often should I audit my Google Ads agency?
Annually at minimum, with a lighter mid-year check at 6 months. Audit cadence should also trigger on negative signals: ROAS drop of 15%+ over 60 days, account spending up 25%+ without revenue tracking up commensurately, agency turnover (your strategist changes), or major Google Ads platform shift (e.g. Performance Max policy changes, Smart Bidding model changes). Change of agency or new contract negotiation also justifies a fresh audit.
What's a vanity ROAS and why is it a red flag?
Vanity ROAS is reported revenue divided by ad spend using last-click attribution only, ignoring incrementality, branded vs non-branded split, and view-through inflation. Agencies report vanity ROAS to make accounts look successful; the underlying truth is often that brand search and organic-stealing campaigns are inflating the number. The 2026 audit standard requires: incrementality testing on top campaigns, branded-excluded ROAS view, and conversion paths analysis showing first-touch attribution alongside last-click.
What does brand-eating Performance Max mean?
Performance Max without brand exclusion lists routinely captures branded search queries (your own company name + variations) and reports them as 'new customer' conversions. The result: PMax shows inflated ROAS, while your dedicated branded Search campaign loses impression share. Net effect is zero (you would have captured the brand search anyway), but the agency reports it as PMax success. Standard 2026 fix: brand exclusion list applied to PMax, plus negative keyword campaign-level overrides where supported.
How long does an independent agency audit take?
Self-conducted: 90 minutes for the 15-red-flag scorecard with read-only MCC access. Professional audit (with Search Terms drill-down, Smart Bidding diagnostic, attribution review, competitive intel): 8-15 hours over 3-5 business days. SteerAds delivers a 5-axis audit covering structure, bidding, creative, tracking, and competitive position, typically within 5 working days of MCC access.
What if my audit reveals the agency is underperforming — what next?
Three paths: (1) Renegotiate — share the findings with the agency, set 60-day improvement targets, monitor weekly. Effective when the agency is competent but under-resourcing; (2) Switch — move to a new agency or in-house, using our 30/60/90-day transition playbook; (3) Hybrid — keep the agency for execution but bring in an external strategy consultant. The audit findings drive the choice; do not skip the audit even if you are confident a switch is needed.