Residance: Track Tax Residency

A spreadsheet can count your days. The harder part is knowing whether those days are accurate.

For individuals who divide their time across multiple states and countries, tax residency tracking often starts with a spreadsheet.

It makes sense. A few columns for dates, locations, and days spent. Some formulas to calculate totals. Perhaps a color-coded warning when a jurisdiction approaches its threshold.

Simple. Familiar. Seemingly sufficient.

Until travel becomes more complicated.

A last-minute flight. An unexpected overnight stay. A calendar entry that never gets updated. A trip remembered differently six months later.

The problem isn't that spreadsheets can't do the math.

It's that the math is only as reliable as the information entered.

And when residency exposure can depend on individual days, that distinction matters.

Manual Tracking Creates Invisible Gaps

Most spreadsheets rely on one critical assumption: someone will consistently record where they were.

That sounds manageable when you're tracking a handful of trips each year.

It's considerably harder when your schedule involves multiple homes, frequent international travel, changing itineraries, and unexpected stops.

You might remember spending a week in New York. But did you arrive Monday evening or Tuesday morning? Did your return flight leave Sunday or get pushed to Monday?

Those details can affect a day count, depending on the jurisdiction's rules.

And they're exactly the details most likely to disappear from memory.

A spreadsheet won't tell you when you've forgotten to enter a trip.

It will simply calculate a total based on incomplete information.

That's the risk: an inaccurate record can look perfectly organized.

Calendars Show Intentions, Not Necessarily Reality

Many people build residency spreadsheets from their calendars.

But a calendar records what was scheduled.

It doesn't necessarily record what happened.

A three-day business trip becomes four days after a weather delay. A planned weekend in Miami is canceled. A quick stop in California turns into an overnight stay.

Unless someone reconciles the calendar against actual travel, the spreadsheet can preserve the original plan rather than the final outcome.

Over time, those differences accumulate.

This creates two distinct questions:

Where did you intend to be?
Where were you actually present?

Both matter for planning. But they're not interchangeable.

A reliable residency process needs to distinguish planned travel from completed travel — and make it easy to update the record when plans change.

A Year-End Count Comes Too Late

Traditional spreadsheets are often retrospective.

You travel. You record the dates. You review the totals periodically.

That approach may help document the past, but it doesn't necessarily help you make decisions about the future.

Imagine you're considering another two-week stay in a state where you've already spent significant time.

Before booking, you need to know your current count, your remaining room under the threshold you're monitoring, and how the proposed trip would change your position.

Not at the end of the quarter.

Before you commit.

This is where residency tracking moves beyond bookkeeping.

The real value isn't knowing how many days you've used. It's knowing how many you have left to work with.

That requires a current record and a forward-looking view — not just an annual total.

Complexity Grows Faster Than the Spreadsheet

One person. Two states. A few trips.

A spreadsheet might be entirely adequate.

Now add a primary residence, several vacation properties, international travel, business obligations, and different residency tests across jurisdictions.

The system changes.

Different locations may require different thresholds. Different rules may govern what counts as a day. Some residency determinations also depend on domicile, available homes, or other connections — not simply physical presence.

A formula that works for one jurisdiction may be misleading when applied to another.

The spreadsheet can still hold the information.

But maintaining the system becomes its own task.

Someone must update the formulas, validate the assumptions, reconcile travel changes, and review the totals.

And as complexity increases, so does the opportunity for unnoticed errors.

A Total Is Not the Same as a Defensible Record

Consider two records:

Record A: New York — 112 days.

Record B: A dated history of entries, departures, and locations that supports the 112-day total.

Both contain the same number.

Only one helps explain how that number was reached.

If a tax authority questions a taxpayer's physical presence, a self-maintained spreadsheet may be useful, but it won't necessarily be sufficient on its own.

Supporting evidence can matter. Depending on the circumstances, that might include travel itineraries, transportation records, accommodation details, and other contemporaneous documentation.

The goal isn't to accumulate data for its own sake.

It's to maintain a consistent account of where time was spent — and preserve enough context to investigate discrepancies.

A spreadsheet assembled months after the fact is inherently different from a record maintained as events occur.

Neither automatically settles a residency question. But the quality and timing of the underlying records matter.

The Cost of an Error Isn't Always Obvious

A missing day in an expense report might mean a small reimbursement discrepancy.

A missing day in a residency record can have more significant implications.

The consequences depend on the relevant jurisdiction, the taxpayer's circumstances, and the applicable residency rules.

But the broader point is straightforward: certain records deserve more attention because the decisions made from them carry greater consequences.

This is also why planning exactly to a residency threshold can be unnecessarily fragile.

Even with a reliable system, there may be exceptions, unexpected travel, or differences in how individual days are treated.

Maintaining a reasonable margin gives you flexibility when reality departs from the itinerary.

A threshold is a boundary to understand — not a target you need to hit.

Spreadsheets Still Have a Place

None of this makes spreadsheets useless.

They're excellent for calculations, custom analysis, collaboration, and organizing information for advisors.

For someone with limited travel and a straightforward residency profile, a carefully maintained spreadsheet may be enough.

The problem emerges when the spreadsheet becomes the entire tracking infrastructure.

When every update depends on memory, every itinerary change requires manual reconciliation, and every future decision requires another round of calculations, the process becomes harder to trust.

The better approach is to separate the tasks.

Capture where time is actually spent. Maintain a clear history. Track upcoming travel against configured thresholds. Then use that information for analysis and professional advice.

The spreadsheet can remain part of the workflow.

It just shouldn't have to do everything.

From Counting Days to Managing Presence

This is the thinking behind Residance.

Rather than relying exclusively on manual entries, Residance supports background location tracking alongside the ability to record past visits and plan future ones.

A dashboard, calendar, and interactive map make it easier to understand where time has been spent. Jurisdiction-level day counts and configurable thresholds help users see how much room remains before reaching limits they're monitoring.

Reports make it easier to review and share location records.

The aim isn't to replace a tax advisor or determine legal residency automatically. Tracking physical presence is one component of a broader residency strategy, and the underlying records still require review.

The aim is simpler:

Less reconstruction. More visibility. Better decisions before the next trip.

Because for people whose lives span multiple jurisdictions, residency tracking shouldn't be an administrative exercise they revisit at year-end.

It should be part of how they plan their time.

And when the objective is to stay below the line, the first requirement is knowing where you stand.