Connecticut runs on income "cliffs"
Connecticut’s retirement-income tax breaks hinge on a single number: your federal adjusted gross income (AGI). Below $75,000 for a single filer, or $100,000 for a married couple filing jointly, Social Security, pension and annuity income is fully exempt from state tax.
Above those thresholds the break phases out, and it is gone entirely by $100,000 (single) or $150,000 (joint). One number — federal AGI — decides whether a large slice of your retirement income is taxed at all.
Where an adviser helps: managing AGI year by year so you stay below the thresholds where it counts, rather than tipping over a cliff by accident.
2026 is the year IRA withdrawals became fully exempt
There is a milestone hidden in the 2026 rules: traditional IRA distributions are now 100% exempt for those under the AGI thresholds — up from 75% in 2025 and 50% in 2024.
That phase-in is now complete, which makes the timing of withdrawals around the thresholds matter more than ever. A withdrawal that keeps you under the line is fully shielded; the same withdrawal that pushes you over may not be.
Where an adviser helps: sequencing IRA withdrawals and conversions around the AGI thresholds so the full exemption actually applies.
Pensions and annuities follow the same line
Pension and annuity income is fully exempt under the same AGI thresholds, with a gradual phase-out in the band just above them.
Because Social Security, pensions, annuities and IRA income all key off the same AGI figure, they move together. Pull one source up and you can jeopardise the exemption on all of them at once.
Where an adviser helps: looking at all your income sources together, since they share one threshold — not optimising each in isolation.
The estate-tax worry has largely gone away
For years Connecticut’s estate tax was a live concern. That has changed. Connecticut now matches the federal exemption at $15 million per person — $30 million per couple — for 2026, up from $13.99 million in 2025.
For most families that means the state estate tax is simply no longer the threat it used to be. The planning focus shifts elsewhere — including to a tax Connecticut has that no other state does.
Where an adviser helps: re-checking an estate plan that was built around the old, lower exemption — what was once urgent may now be unnecessary, and the reverse.
Connecticut is the only state with a gift tax
This is the one that surprises people. Connecticut is the only state in the country with a gift tax. Lifetime gifts above the exemption are taxed at a flat rate.
That single fact changes lifetime-gifting strategy. A gifting plan that makes perfect sense in New York or Florida can trigger a state-level tax here that exists nowhere else.
Where an adviser helps: building a gifting strategy that accounts for Connecticut’s unique gift tax, rather than copying advice written for other states.
Property taxes vary wildly — by town
Connecticut’s property taxes are among the highest in the nation, but the headline hides enormous variation. Property is assessed at 70% of value, and each town sets its own mill rate — so the effective rate depends heavily on where you live.
The spread is dramatic: Greenwich’s effective rate is a fraction of Hartford’s. Two identical homes in two towns can carry very different annual bills.
Where an adviser helps: factoring the real, town-specific property cost into where you buy, downsize or retire — not just the listing price.
Working in New York, living in Connecticut
For Fairfield County especially, the cross-border question is everyday reality. Connecticut residents who work in New York owe New York tax on that income — but Connecticut grants a credit to prevent the same income being taxed twice.
Getting the credit right is what stops a common situation from becoming an expensive one. Done well, you do not pay twice; done carelessly, you can leave money on the table or trip a filing problem.
Where an adviser helps: coordinating the New York and Connecticut filings so the credit is claimed correctly and you are not double-taxed on cross-border income.
This guide is general information, not financial, tax or legal advice. Figures are current for the 2026 tax year and may change — verify against the cited sources and your own circumstances before relying on them.