HSA Strategy for TSMC Arizona Employees

Eligibility

Qualify first; strategize second

HSA eligibility depends on coverage under an HSA-eligible high-deductible health plan and the absence of disqualifying coverage. Family coverage, spouse coverage and Medicare can each change the answer.

If you are a new hire or a transferee, work from the current Arizona benefit documents — not assumptions carried over from a prior country or employer. Once the plan qualifies, the next stop is the limit.

2026 limits

Know the limit — and your real share of it — before payroll

IRS Revenue Procedure 2025-19 sets the 2026 contribution limit at $4,400 for self-only HDHP coverage or $8,750 for family HDHP coverage, before any eligible age-55 catch-up. Employer contributions count toward that same annual limit.

Here’s how a transfer year plays out: arrive in Arizona midyear and you may have only partial-year eligibility unless special rules apply, while the last-month rule and its testing period can affect the amount you are actually permitted to contribute. Confirm your eligible months before you set payroll — then make sure the cash side holds.

Cash reserves

A high deductible needs real money behind it

Some employees invest HSA dollars and pay current medical bills from cash. That can be tax efficient — but only if your household can absorb the deductibles and out-of-pocket costs.

A relocation year can make liquidity worth more than optimization. Weigh the medical plan choice against housing deposits, travel, family needs and the timing of variable pay. Once the cash is safe, one question remains: where will you be living?

Future residence

Plan the HSA for the possibility of Taiwan

If you may return to Taiwan, ask now how the HSA provider handles foreign addresses and debit-card access. Keep records of qualified medical expenses and account statements either way.

An advisor familiar with TSMC Arizona can coordinate the HSA with your 401(k), relocation cash, bonus planning and cross-border account inventory — which is exactly what the yearly routine below does.

Before payroll locks

Make the HSA part of the plan, not a side account

Before you set payroll contributions, confirm your eligible months, the employer deposits and your year-to-date contributions. Protect cash for likely medical costs, invest only the portion that fits your household and keep receipts filed with the statements for possible future reimbursement.

Read this as preparation, not as individualized advice — your current TSMC Arizona documents control the medical plan and any employer contributions, and a tax professional should confirm the contribution math.

• Confirm the TSMC plan you selected is HSA-eligible
• Count your eligible months and any other health coverage
• Subtract employer deposits and prior year-to-date contributions from the limit
• Protect cash for the deductible and out-of-pocket costs
• Verify provider access from abroad if a return to Taiwan is possible