Which accounts and share lots pay for retirement? Kestrel Bay Retirement Advisors on tax-efficient withdrawals

What does a tax-efficient withdrawal strategy cover before and after 59½?

Many early retirees fund the first year from the account with the biggest balance, or let the broker sell the oldest shares. In the hypothetical Jonah-and-Mei example further down, that choice turns $120,000 of spending into $75,800 to $87,800 of taxable income instead of $0. Same lifestyle, same household, very different tax return.

The plan decides, year by year, which source pays the bills. The sources are taxable lots (shares from NSO exercises, ISO exercises, RSU vests and early-exercised startup shares), 401(k)s, any Roth money and cash. It also sets which lots inside each account get sold, which is the part brokers' defaults handle badly.

The people who usually need this are those retiring before 59½ with equity-compensation shares in a brokerage account. Jonah and Mei, our hypothetical household, plan to stop work at 52 and 50. That leaves 7½ years before Jonah can touch his 401(k) without penalty, and the rule of 55 doesn't help him because he leaves before the year he turns 55.

The plan is built around three ages, and each gets one line here because other pages cover the details of Social Security and Roth conversions:

• 59½: penalty-free withdrawals from most 401(k)s and IRAs begin.
• 67: full retirement age for Social Security for anyone born in 1960 or later.
• 75: the age required minimum distributions start for that same group.

How Kestrel Bay Retirement Advisors builds the withdrawal plan, step by step

Before Kestrel Bay Retirement Advisors suggests selling any lot for spending, it writes down the gain that lot will report and how much of the year's deduction it uses up. That one habit is the tax-first position in practice: the cost in taxes comes before the decision, not after the trade settles.

One practical detail people miss. Once wages stop, no paycheck withholding covers brokerage sales, so the plan sets quarterly estimated payments to avoid an underpayment penalty.

• You send lot reports and grant records. We record the basis of every lot, and for ISO shares we record the regular-tax basis and the AMT basis separately.
• We map each year from the last paycheck to RMD age: spending, other income, and which penalties or exceptions apply.
• For each candidate source, we estimate the taxable income per $1 spent, and we flag any year where the standard deduction would go unused.
• We pick the sources for each year and write lot-by-lot sale instructions.
• We rerun the plan every year once the 1099-B and 1099-DIV arrive.

What do you receive once the plan is drawn up?

You get documents you can hand to a broker or a tax preparer, not a general recommendation. The list below is what arrives after the first draft is finished.

Be realistic about the year-by-year table: it gets less reliable the further out it goes. Only the next 12 months are treated as instructions. Later years are a draft that gets redone each year.

One more flag. Medicare looks back two years. The Part B premium you pay at 65 depends on your MAGI at 63, and the premium at 66 depends on your MAGI at 64. So the plan marks any large sales scheduled for 63 and 64. The details sit on the IRMAA page.

• A year-by-year table from retirement to RMD age, showing the source, the amount and the estimated taxable income for each year.
• Broker-ready lot instructions for the next 12 months.
• Estimated quarterly tax payment amounts.
• A list of low-income years with spare deduction room, and what could fill it.
• A one-page summary after each annual review, showing what changed and why.

Which withdrawal mistakes cost early retirees the most?

Letting first-in, first-out sell the oldest ISO lots is the quiet one. On a $120,000 sale, it reports $108,000 of gain, where selling NSO-exercise shares would have reported $12,000. Nobody chose that; the default did.

Taking a 401(k) withdrawal at 52 with no exception is the expensive one. On $120,000, the IRS adds a $12,000 penalty, and the whole amount is still taxed as ordinary income. We'd rather see almost any taxable lot sold first, because the penalty buys you nothing.

Wasting a zero-income year hurts in a way that never shows up on a bill. In the NSO case, the $12,000 gain uses only part of Jonah and Mei's $32,200 deduction and leaves $20,200 unused. That room could have absorbed some ISO gain or a Roth conversion at no federal tax.

Two more. Skipping estimated payments after wages stop invites an underpayment penalty. And spending all the taxable money in the first years leaves only pre-tax accounts, so every later dollar spent is fully taxable and RMDs at 75 come on top.

A hypothetical first year of retirement for Jonah and Mei

Hypothetical: Jonah, 52, is a product director at a chip maker with ISOs and NSOs, and Mei, 50, is a former startup employee holding early-exercised shares. They stop working and need $120,000 for the first year, with no other income, filing jointly. Notice in the table that the same $120,000 of spending produces anywhere from $0 to $87,800 of taxable income, depending only on the source.

NSO shares are cheap to sell because their basis equals the market value at exercise, which was already taxed as wages. Only growth since exercise is gain. Selling $120,000 of NSO shares with $108,000 basis reports $12,000, and their 2026 standard deduction of $32,200 absorbs all of it, so taxable income is $0. Selling $120,000 of long-held ISO shares with $12,000 basis reports $108,000, which is $75,800 after the deduction. A 401(k) withdrawal of $120,000 means $87,800 taxable ordinary income plus a $12,000 penalty.

Yes, the ISO gain is still there. Choosing NSO shares doesn't erase it. The plan picks the year it gets reported, rather than letting the broker pick.

Investing involves risk, including loss of principal, and the share values in this example are for illustration only.

Bringing your accounts to Kestrel Bay Retirement Advisors

The first step is the request form on kestrelbayretirement.com. There is no published phone line, and reviews happen over video or phone, from any US state. Kestrel Bay Retirement Advisors requires $400K of investable assets, and it explains its fees in writing before any work starts.

Have these ready: the lot-level export from each brokerage account, exercise confirmations for every ISO and NSO exercise, your most recent 401(k) statement, and last year's tax return. Missing exercise confirmations most often delay the first draft, so pull them early.

Two limits. For Jonah and Mei, the plan is a draft until they actually stop working, because it rests on assumptions about spending, share prices and tax law. It also doesn't settle how many ISOs to exercise now. That choice sets basis and AMT exposure and has its own page, as do concentrated stock positions and Roth conversions.