keyword

tax underpayment penalty calculator

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

$ curl "https://api.seodata.dev/v1/keyword?q=tax+underpayment+penalty+calculator&country=us" +--------------+------------------+ | volume | 1,300 | | cpc | $1.68 | | competition | 0.03 | | country | US | | updated | 2026-08-30 | +--------------+------------------+

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	15/20
irs underpayment penalty	5,400	$2.71	15/20
underpayment tax penalty	4,400	$0.99	15/20
estimated tax penalty	1,900	$1.54	16/20
underpayment of estimated tax penalty	1,600	$0	15/20
underpayment tax penalty calculator	1,300	$9.32	20/20
tax penalty for underpayment calculator	1,300	$9.32	16/20
tax penalty underpayment calculator	1,300	$9.32	16/20
estimate tax penalty calculator	260	$0	16/20
estimated taxes penalty calculator	260	$0	16/20

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=tax+underpayment+penalty+calculator&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