Florida Residency · Est. 2026
Other apps count days in Florida. Southbound tells you the only number that matters: how many more days you can spend outside it.
iPhone · Free early access · Private by design
The actual Home screen. Not a marketing mock.
27
States · tax > 5%
Top marginal rates. Source: Tax Foundation, 2025
New: The Florida House voted to eliminate property tax on primary residences starting 2027. (HJR 203, pending voter approval)
02 · The problem
States with high income taxes — New York and California in particular — have dedicated residency audit units.
A residency audit can take years and cost tens of thousands in legal fees — before any tax liability.
The single most important piece of evidence is an accurate, contemporaneous log of where you were, every day. Not reconstructed from credit card statements. Not a calendar filled from memory.
I
How many days did you spend in each state? The burden of proof is on you.
II
Where is your home? Where do you vote? Where is your doctor?
III
Where are your bank accounts, business operations, and club memberships?
IV
New York uses a "near and far" test weighing time, business, family, possessions, and social connections.
03 · The product
Your Departure Budget is the only number that matters. Open the app, see it, make the call — no mental math, no spreadsheets, no end-of-year scramble.
2026 Departure Budget
days left you can spend outside Florida
I
Your friend invites you to a week in the Hamptons. Open Southbound. One number tells you if you can go.
II
Get notified when your departure budget is running low. Never accidentally overstay a trip and lose your residency claim.
III
See exactly how many travel days you have left. No mental math, no spreadsheets, no guessing at year-end.
Workflow · four steps
1
Grant "Always Allow" during setup. Low-power monitoring, not continuous GPS.
2
Your phone detects meaningful location changes. Southbound checks the Florida boundary.
3
Running day count, calendar view, and projection toward 183.
4
Date-by-date report with confidence levels. Share with your CPA.
04 · Who it's for
You've made the move — or you're making it. You know the 183-day rule isn't a suggestion. It's the line between Florida residency and a six-figure tax bill from the state you left.
01
Changed your domicile to Florida but still own property or have ties in NY, CA, NJ, CT. Those states are aggressive about residency audits — you need documentation that holds up.
02
Winter in Florida, summer elsewhere. The exact count matters. One day short and a state auditor has grounds to challenge your claim.
03
Your CPA told you to keep a log. Southbound replaces the spreadsheet you never update. Export a clean report whenever they ask.
04
If you advise HNW clients on state tax residency, Southbound is the tool you wish they had. See the advisor page →
Privacy
Southbound has no servers, no user accounts, and no analytics. Your location data is stored on your iPhone and backed up through your personal iCloud account. We never receive, process, or have access to any of it.
01
Your Florida day record syncs to your iCloud account automatically. Lose your phone, get a new one, sign in with your Apple ID — your data is there.
02
We don't operate servers, databases, or cloud infrastructure. There is no "Southbound account" and no data on our end to breach, subpoena, or sell.
03
iCloud data is encrypted in transit and at rest. Your residency record is protected by Apple's standard iCloud security model — the same infrastructure that guards your photos and health data.
Pricing
Less than one billable hour. Less than 0.2% of what you'll save.
Early Access
$249/year after early access ends
iPhone only · No credit card required
FAQ
Most states — including New York, California, New Jersey, and Connecticut — consider you a statutory resident if you spend 183 or more days in the state and maintain a permanent place of abode there. By spending 183+ days in Florida, which has no state income tax, you strengthen your claim to Florida domicile and reduce the risk of being taxed by your former state. The specific rules vary by state. Consult your tax advisor.
Southbound does not use GPS. It monitors cell tower and Wi-Fi network changes — the same low-power system Apple uses for Find My. When your phone detects a meaningful location shift, Southbound checks whether you're inside the Florida state boundary and records the result locally. Most users see zero measurable battery impact.
Yes. Southbound has no servers and no user accounts. Your data is stored on your iPhone and backed up through your personal iCloud account — the same Apple infrastructure that protects your photos and health data. We never receive, store, or have access to your location information. When you export a report, it travels through your iPhone's native share sheet — you decide where it goes.
Your data is backed up automatically through iCloud. Sign in with your Apple ID on your new device, install Southbound, and your complete residency record will be there. No export/import process, no account to recover — it works the same way your other iPhone data does.
Southbound creates a contemporaneous, automatically-generated record of your presence in Florida — which is the strongest form of day-count evidence in a residency dispute. However, day count is one factor among several that states examine. Southbound is a documentation tool, not legal advice. Work with a qualified tax attorney for audit defense.
A date-by-date record showing Florida or non-Florida status for each day, along with confidence levels based on GPS accuracy. Days you've manually overridden are clearly flagged. The report can be exported as a CSV file for use by your tax professional.
$249 per year after launch. The app is currently free during the early access period.
Get access
Install Southbound, grant location access, and let it run. The next time your advisor asks how many days you've been in Florida — or a state auditor does — you'll have the answer.
iPhone · Free during early access