How to Prepare for a Cross-Border Tax Adviser Meeting

Define the decision in one sentence. For example: “Can I work in Spain for this foreign employer from October?”

Then ask which payroll and tax steps are due in each country.

Then supply a timeline of where each household member lived and worked, source and timing of income, and material asset events.

Separate known facts from assumptions.

Ask an adviser to state jurisdiction, scope, deliverable, fee basis and who will handle filings.

Cross-border advice often needs two licensed professionals rather than one person claiming universal coverage.

An engagement letter should say whether immigration, social security, company permanent establishment, investments and estate questions are in or out of scope.

Household example

Illustrative composite · not personal advice or resident testimony

A US founder moving to Lisbon has salary, company dividends, a US rental, stock options and a spouse's Portuguese job.

• Instead of asking 'How much tax will we pay?', the couple sends a two-year residence calendar, cap table and vesting schedule, last two returns, employer/entity chart and intended move date.

They request a written decision tree and list of missing facts before any restructuring.

Traps to avoid

• Sending a pile of bank PDFs without a source-of-income summary.
• Asking for a precise tax number before giving dates, ownership and work location.
• Assuming the adviser also covers immigration, payroll, social security and estate law.
• Waiting until after an equity sale or company registration to seek planning advice.
• Paying for open-ended calls without an agreed written deliverable and fee range.

Rules & evidence

Tax residence, treaty tie-breakers, source rules and filing duties vary by country and year.

An adviser needs day counts, home/family facts, contracts, asset ownership and both-country returns to analyze the correct year.

A bank account location alone rarely determines tax source.

For US-connected households, IRS Publication 54 is a starting point for continued US reporting while abroad; it is not a substitute for the destination-country rules.

Pension and treaty questions may need product and plan documents, not merely balances.

When to hire an advisor

Book advice before a non-reversible transaction, missed election deadline or employer setup decision.

Ask for a scoped memo: conclusions, assumptions, primary sources, open issues, actions by country and who owns each filing.

If one adviser cannot cover both countries, request coordination between two qualified specialists.

Make the first meeting produce a decision

Send a short covering note rather than asking the adviser to reconstruct your life from attachments.

Put the proposed first workday, lease start, flight dates, citizenships and existing tax residences at the top.

A useful answer should identify what changes if your departure slips into the following tax year.

For an employee, include the actual employing entity, not just the brand on your laptop.

Add the job description, authority to sign contracts, reporting line and countries in which clients are served.

For a business owner, add ownership percentages, directors, where management decisions happen and how you take money out.

These details help distinguish personal tax questions from employer registration or company residence questions.

Ask the adviser to rank the decisions that need an answer before you spend money.

Your school deposit probably does not need an elaborate tax opinion.

Good prioritization keeps the bill proportionate and stops low-value questions crowding out an irreversible transaction.

Agree the deliverable and test its assumptions

Ask for a written scope with the jurisdictions, tax years, income types and professional responsible for each issue.

A destination accountant may prepare the local return but not advise on origin-country exit tax or stock options.

If another professional is required, ask who will coordinate the facts and whether there will be a separate engagement and fee.

• Request an estimate that includes likely follow-up work. A fixed planning fee can exclude registration, translations, return preparation and representation during a query.

An hourly engagement should identify a budget limit and when approval is needed to exceed it.

Do not treat a free introductory call as a binding conclusion; it usually establishes whether the firm can take the work.

Before approving the final note, check every assumed date and amount.

A projected bonus is not guaranteed income; a spouse intending to arrive later may have a different residence timeline.

Ask the adviser to show both the favorable outcome and the fallback if an election, certificate or exemption is unavailable.

After the meeting, make a responsibility list: what you will supply, what the employer will decide, what the adviser will file, and the date each item is due.

A written opinion is not a completed registration.

Ask how the conclusion changes if a new client, spouse, property or employment arrangement is added, and when the plan should be reviewed again.