keyword

underpayment tax

Monthly search volume and cost-per-click data for "underpayment tax" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=underpayment+tax&country=us" +--------------+------------------+ | volume | 210 | | cpc | $8.16 | | competition | 0.04 | | country | US | | updated | 2026-08-31 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
underpayment penalty	6,600	$0	20/20
irs underpayment penalty	5,400	$2.71	20/20
underpayment penalty irs	5,400	$2.71	18/20
underpayment tax penalty	4,400	$0.99	20/20
underpayment penalty tax	4,400	$3.34	16/20
estimated tax penalty	1,900	$1.54	20/20
estimated tax underpayment penalty	1,600	$0	20/20
how much is the penalty for not paying estimated taxes	1,600	$8.25	20/20
underpayment of estimated tax penalty	1,600	$0	20/20
what triggers irs underpayment penalty	1,000	$0	18/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=underpayment+tax&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt