What is the difference between ROAS and ROI?

ROAS (Return on Ad Spend) measures gross revenue divided by ad spend. It's campaign-specific and doesn't account for COGS or other costs. ROI (Return on Investment) ROI (Return on Investment) measures profit divided by total investment, including all costs. ROAS of 4.0 might mean 10% net ROI after COGS, fulfillment, and overhead. Use ROAS for campaign optimization and ROI for business decisions.

What is a good ROAS for my business?

A good ROAS depends on your gross margins. If your margin is 50%, you need ROAS of at least 2.0 to break even on ad spend alone (ignoring other costs). Most profitable e-commerce businesses target 3-5x ROAS. SaaS companies with 80%+ margins can sustain 2-3x. Calculate your break-even ROAS as: 1 ÷ Gross Margin %. For 40% margin, break-even ROAS is 2.5.

How do I track ROAS accurately?

Use UTM parameters, conversion tracking pixels, and platform attribution tools. Google Ads conversion tracking, Meta Pixel, and server-side tracking (GTM Server Side, Facebook Conversions API) provide increasingly accurate data. Multi-touch attribution models give more accurate ROAS for longer sales cycles. Single-touch (last-click) attribution typically underestimates the impact of top-of-funnel campaigns.

What causes low ROAS and how do I fix it?

Common causes: poor targeting, weak creative, low landing page conversion rates, incorrect attribution, or market saturation. Fix by: A/B testing ad creative and copy, refining audience segments, optimizing landing pages for conversion, improving offer relevance, and adjusting bidding strategies. Use ROAS data to identify which campaigns, audiences, and creatives perform best.

Should I use ROAS or CPA (Cost Per Acquisition)?

Both; they answer different questions. ROAS tells you revenue efficiency (how much you earn per dollar spent). CPA tells you cost efficiency (how much it costs to acquire a customer). Use ROAS for scaling decisions (increase spend on high-ROAS campaigns) and CPA for budget planning (can you acquire customers profitably at current costs?).

How does attribution window affect ROAS?

Shorter attribution windows (7-day click, 1-day view) show lower ROAS because they miss delayed conversions. Longer windows (28-day click, 28-day view) show higher ROAS but may over-attribute. The right window depends on your sales cycle: 7-14 days for low-consideration, 28-90 days for B2B or high-ticket items. Be consistent when comparing ROAS across time periods.

What is blended ROAS vs channel-specific ROAS?

Blended ROAS = total revenue from all channels ÷ total ad spend across all channels. Channel-specific ROAS isolates performance of individual platforms (Google, Meta, TikTok, etc.). Blended ROAS gives the big picture; channel-specific ROAS drives optimization decisions. Most businesses optimize at the channel level and report at the blended level.

How do seasonality and market conditions affect ROAS?

ROAS typically drops 20-40% during peak competitive periods (Q4 holiday season, Prime Day, industry events) because more advertisers compete for the same audience. Plan for lower ROAS during these periods and higher ROAS during off-peak times. Year-over-year ROAS comparison is more meaningful than month-over-month due to seasonality.

ROAS計算機（広告費用対効果）

広告費用対効果（ROAS）、純収益、広告キャンペーンの利益率を計算します。