Why this matters even if you're under the limit today
How can I owe estate tax if I'm under the exemption now?
Because wealth compounds. A $10M estate growing 5% a year becomes more than $43M in 30 years - past a couple's ~$30M exemption. The tax is assessed at death on the amount above the exemption, at 40%.
How does lifetime gifting help?
Gifts made during life (above the annual exclusion) use your exemption at today's value, and all future growth on those gifted assets happens outside your estate. Gifting earlier, while assets are smaller, removes more future growth from the taxable estate.
Is this exact?
No. It's a planning estimate. Exemptions rise with inflation and can change with the law, growth isn't a straight line, and state estate taxes vary. Use it to see the direction, then work out the details with your estate attorney and CPA.
General information, not tax or legal advice. Exemptions rise with inflation and can change. This is a simplified projection that ignores state estate taxes and assumes constant growth. Consult your estate attorney and CPA.