FOR PROFESSIONALS

A residency position is only as strong as the day record behind it

Most clients reconstruct their year from memory at tax time, which is exactly the evidence that fails an audit. SpyglassBeacon gives them a contemporaneous, timestamped day count for every state, exported as a report you can put in the file. It documents the facts; the professional judgment stays yours.

Page 1 of a SpyglassBeacon day-count report: days by state, international clocks, and the Substantial Presence Test by year

Page 1 of a real report, exported from the app on a fictional client's year. The day-by-day record follows on the next pages.

FOR CPAS & TAX PROS

Documentation, not memory

A per-state, day-by-day PDF built contemporaneously on the "any part of a day" standard audits turn on. The evidence layer your clients were missing.

FOR FINANCIAL ADVISORS

Protect the relocation plan

A move to a no-tax state only delivers if the residency position holds. Have clients document their days from day one, so the plan rests on a record, not a recollection.

FOR ESTATE & TRUST ATTORNEYS

Domicile evidence that holds

Domicile disputes are argued from where the client actually spent their days, across years. Give the plan a contemporaneous record instead of a good intention.

FOR EAS & BOOKKEEPERS

Day counts clients hand you

Part-year splits, 8840s, and FEIE claims all start with a day count nobody kept. Clients export it in one tap instead of guessing in March.

WHAT YOUR CLIENTS SEE

SpyglassBeacon on iPhone: A live count per state, with a warning as New York nears 183 — A live count per state, with a warning as New York nears 183

SpyglassBeacon on iPhone: The day-by-day ledger, drive-through states marked as transit — The day-by-day ledger, drive-through states marked as transit

SpyglassBeacon on iPhone: Schengen 90/180 and the UK tax year, counted automatically — Schengen 90/180 and the UK tax year, counted automatically

SpyglassBeacon on iPhone: The Substantial Presence Test, weighted across three years — The Substantial Presence Test, weighted across three years

Frequently asked questions

Updated 2026-10-05

Who is SpyglassBeacon for on the professional side?

CPAs and tax preparers who defend client residency positions, and financial advisors whose clients relocate for tax reasons. The end user is your client, who runs the app; you receive the exported record for the file.

Does my client's data come to me, or stay with them?

It stays on the client's device, with no account, no cloud copy, and nothing uploaded or sold. The client chooses to export a PDF and share it with you. You get the documentation without SpyglassBeacon ever holding the data.

What does it produce?

A per-state day count and a day-by-day appendix as a PDF, on the 'any part of a day' standard that residency audits turn on: contemporaneous and timestamped rather than reconstructed at tax time.

Does SpyglassBeacon give tax or legal advice?

No. It is a documentation tool that produces the evidence a residency position relies on. The professional judgment stays with you and your client's advisors.

Working with a specific situation? See who SpyglassBeacon is for by rule and audience, or the state residency rules reference.