HubSpot Forms: Setup, Limits and Best Practices

What does each HubSpot plan include for forms?

Every plan can build forms, embed them and send a follow-up email. When we checked in October 2026, form steps needed any Starter plan, with up to 20 steps per form, and the progress bar needed Marketing Hub Starter. Conditional logic needed Marketing Hub or Content Hub Professional, and email domain blocking needed Marketing Hub or Content Hub Starter.

HubSpot's own pages disagree on the number of conditional logic rules per form, so check the limit in your account before you plan a large form around it.

Should you use the new or the legacy form editor?

Use the new editor for new forms. HubSpot now labels the old editor legacy and recommends the updated one. Validation rules on properties are only enforced on forms built in the new editor, and form shortening and global form events are new-editor features. The legacy editor still holds progressive fields, dependent fields and raw HTML forms.

• Form shortening hides fields HubSpot can fill by enrichment; enriched values are marked with an AI icon, and HubSpot notes it may need extra compliance steps.
• Unsupported properties: some property types, such as calculation, rollup and rich text, can't be used as form fields.
• No migration tool was documented when we checked, so moving a legacy form means rebuilding it.

How do form fields map to contacts and companies?

Each field writes to the property it's connected to, which decides the object, usually contact or company. HubSpot deduplicates contacts by email. With the setting to create new contacts for unknown emails turned off, HubSpot may update a contact from the browser cookie instead, which can overwrite records. A company domain field updates or creates the matching company.

• Hidden fields pass values such as lead source; a required field can't be hidden, and pre-population can overwrite the hidden value.
• Query strings can pre-fill fields on all plans; checkbox values must be true or false and dates YYYY-MM-DD.
• Ask only what you use. Each field should feed routing, scoring or follow-up; the field plan template records why each one exists.

How do you keep spam out and consent clean?

Add every site you embed on to the form's allowed domains, or HubSpot marks those submissions as spam. Turn on reCAPTCHA, available on all plans, unless an integration submits through the API, since CAPTCHA blocks API submissions. Block free or disposable email domains if you need business emails, and choose a consent option that matches how you'll email people.

• Spam submissions don't create records, trigger automation or count in analytics, and are deleted 90 days after submission.
• Consent options: implicit consent with communication checkboxes, separate consents, or legitimate interest with a notice. The communication checkbox can't be pre-selected.

What happens after someone submits?

Show a thank-you message or redirect to a page, URL, meeting link or payment link. Send notifications to the right people, and use the form's simple workflows for follow-up: free accounts get one follow-up email, Marketing Hub Starter up to 10 actions, and Marketing Hub Professional multiple workflows. Follow-up emails only reach marketing contacts.

For routing, lead status and anything conditional, use a full workflow triggered by the form submission. Our HubSpot workflows guide covers triggers and testing.

How do you measure form performance?

Each form's performance view shows views, submissions and conversion rate, which HubSpot calculates as submissions divided by views, plus submissions by source and, for multi-step forms, step completion. Submissions through the forms API don't count views. Review forms monthly, remove fields that lower completion without feeding routing or scoring, and check the spam tab.

HubSpot forms checklist