You elected S corp — nobody handed you the calendar. DueDays does: every federal and California filing, payment and renewal for 2026, pre-loaded the moment your account is set up, with the paperwork filed next to each one. Tap any month below to see what's actually due.
Free during early access · Founder pricing locked in when billing starts · You'll confirm your email, then we send sign-in details
The federal penalty for a late Form 1120-S in 2026 — charged even when the corporation owes no tax.
Deadlines a calendar-year California S corp owes across the IRS, FTB, EDD, and Secretary of State.
Separate calendars they live on today. None of the agencies will send you the master list.
Your company, and who runs payroll. That's enough to load the right calendar and hide what your provider already files.
When something comes due, pay or file it, drop in the confirmation, mark it done. Amounts and dates are recorded for you.
Everything your CPA needs is already filed by year, category, and deadline. Tax prep becomes "open the 2026 folder."
The IRS charges per shareholder, per month for a late 1120-S whether or not you owe tax. California adds its own. Set it to your corporation.
I own a security company in California, and I'm an S corp. Every spring I'd open the IRS site, the FTB site, my CPA's emails, and my calendar, and try to remember what I'd forgotten this time.
No single deadline was hard. Keeping all of them in my head was. So I built the page I kept wishing someone would just hand me — and I use it for my own business every week.
A late 1120-S costs $255 per shareholder, per month. When billing launches, DueDays will cost less than one of those — for the whole year — and early-access members keep the founder rate for good.
Full product, no card, no time limit during early access. You'll hear from us before anything changes.
No — it tells you what's due, when, and keeps the paperwork organized. You or your CPA still file. It's the layer between your calendar and your filing cabinet, and it isn't tax, legal, or accounting advice (here's the full disclaimer).
On DueDays' own servers — encrypted in transit and at rest, and private to your account; nobody else can open them. Export everything whenever you like, and deleting your account deletes your data. Details in the privacy policy.
The federal rows apply everywhere, and every state row is editable — add your state's items once and they recur each year. Ready-made state packs beyond California are coming soon.
Perfect — same for ADP, Rippling, or any other provider. Say so during setup and the 941s, DE 9s, W-2s, and 1099s are hidden, so your list only shows what's yours to do.
Nothing today. When billing launches you'll get notice first, and early-access accounts keep the founder rate — $59 a year instead of $99 — for as long as they subscribe. Cancel any time; export first.
Today, share the export. A read-only CPA seat — they see the calendar, pull documents, leave notes — is on the roadmap.
Two questions to set up, free during early access, and everything exports if it isn't for you.
Free during early access · Founder pricing locked in when billing starts