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An 83(b) election must be filed within 30 days of the grant and cannot be made late. Massachusetts taxes most income at a flat 5%, with an additional 4% surtax on taxable income above an annually indexed threshold, currently $1,107,750, producing a 9% top rate. The surtax is marginal, applying only to the excess, and it is measured against total taxable income for the year.
“Our lawyer mentioned 83(b) at signing. It has been six weeks. Are we fine?”
“Does Massachusetts treat the election the same way the federal rules do?”
“We are looking at an acquisition next year. How badly does the 9% rate hit?”
The Thirty Days That Decide Everything Else
The first question at the top has the hardest answer in this article, and it is worth giving straight.
An 83(b) election must be filed within 30 days of the transfer of the restricted property. The window is fixed by federal procedure, it is not extended by good intentions, a busy month, or a lawyer who mentioned it once, and there is no late filing route.
Six weeks after the grant, the election is gone. What remains is a tax profile in which every future vesting event recognizes income at the value on that date, which is exactly the wrong shape for equity in a company you expect to grow.
This is why the election belongs in the first week of a company’s life rather than the first quarter. It is a short form, it costs almost nothing to file, and it is the single most consequential piece of paper most founders will handle.
What the Election Actually Changes
| The Moment | With a Timely 83(b) | Without One |
| At grant | Income measured on a near worthless share, often a trivial amount | Nothing, which feels like the better outcome and is not |
| As shares vest | Nothing further | Income recognized at each vesting date, at the value on that date |
| As the company grows | Growth sits outside ordinary income | Every vesting event captures more of the growth as ordinary income |
| At a sale | Gain measured from the original low basis | Gain measured from a much higher basis already taxed along the way |
| Against the surtax | One controllable year of income | Repeated income in the years the company is worth the most |
| Measurement | 30 days, and no extension exists | The decision is made by doing nothing, and it cannot be revisited |
The logic is simple once seen in that shape. The election chooses to be taxed now, on a share worth very little, rather than later, on a share worth a great deal, and it converts what would have been repeated ordinary income into capital appreciation held from the start.
The risk it carries is equally simple and should be stated. Tax paid on a grant that later becomes worthless is not recoverable, so the election is a small bet placed early rather than a free option.
How Massachusetts Fits
The second question is a good one, and the answer is that Massachusetts largely follows the federal measurement of this income while applying its own rates. Massachusetts personal income tax starts from federal concepts of gross income, with its own modifications, as the Commonwealth’s personal income tax guide describes.
So the election is a federal filing with state consequences flowing from it. Making it changes when income is recognized for both, and failing to make it exposes the same vesting events to the Massachusetts rate as well as the federal one.
The state rate is where the picture diverges from most states. Massachusetts applies a flat 5% to most income rather than a graduated schedule, which is straightforward until a large year arrives.
The Surtax, and Why It Matters at an Exit
Above an annually indexed threshold, currently $1,107,750, Massachusetts adds a 4% surtax to the 5% rate, producing a top marginal rate of 9%. Per the Department’s surtax guidance, only the portion of taxable income exceeding the threshold is subject to it.
That word marginal deserves emphasis, because the label the surtax carries in the press suggests otherwise. Crossing the line does not reprice the whole return. A taxpayer with $1.3 million of taxable income pays the surtax on roughly $192,000 of it, which is about $7,700, not on the full amount.
The third question therefore has a calmer answer than founders expect at the scale of a modest exit, and a serious one at the scale of a large one. Four million dollars of taxable income carries roughly $116,000 of surtax, which is real money and entirely predictable.
What makes it matter is that the threshold is measured against total taxable income for the year, combining wages, interest and dividends, short-term gains and long-term gains. A single liquidity event lands on top of a normal year’s salary rather than being assessed on its own.
The Numbers Behind Founder Equity
- 30 days: the 83(b) window, with no extension available.
- 5%: the Massachusetts rate on most income.
- 4%: the surtax added above the indexed threshold.
- 9%: the resulting top marginal rate.
- $1,107,750: the current threshold, indexed annually.
- 8.5%: the Massachusetts rate on short-term capital gains.
Timing Is the Whole Strategy
Because the rate is fixed and the threshold is annual, almost every genuine planning lever concerns the size of a single year’s taxable income rather than the character of the income itself.
- Spreading a gain across years where the structure permits it, since each year carries its own threshold.
- Moving an option exercise or a vesting event out of a year already carrying a large gain.
- Charitable giving of appreciated assets in the spike year rather than afterwards.
- Watching short-term gains, which Massachusetts taxes at 8.5% before the surtax is considered.
- Coordinating the exit year with retirement contributions and other deductible items.
One route that used to exist is worth mentioning precisely because it no longer does. Married couples once filed separately in Massachusetts while filing jointly federally, effectively splitting income across two thresholds. That path has been closed, and planning built on it needs revisiting.
Options, Briefly and Honestly
Incentive stock options and non-qualified options behave differently at exercise and at sale, and the federal treatment drives most of the complexity, including the alternative minimum tax consequences that make large ISO exercises hazardous.
Massachusetts sits alongside that rather than replicating it, applying its own rates to income as it is recognized, and adding the surtax when a year runs large enough.
The practical point for a founder is narrower than a full options primer. Exercises are taxable events with cash consequences that no one withholds for, which is the same problem founder estimated payments addresses, and a large exercise can move a year across the surtax threshold on its own.
The detailed option analysis belongs with your own tax adviser and counsel looking at the actual grant documents, since the answer turns on terms this article cannot see.
Common Mistakes With Founder Equity
- Treating the 83(b) window as approximate rather than 30 days exactly.
- Assuming that filing nothing is the neutral choice.
- Reading the surtax as a cliff that reprices the entire year.
- Forgetting that a liquidity event stacks on top of ordinary salary for the threshold.
- Planning around the separate-filing route that has since closed.
- Exercising options without setting aside cash for a tax nobody withholds.
Decide Early, Then Decide Annually
Founder equity produces two kinds of tax question. The first is a thirty-day decision made once, at the start, when the stakes look trivial and are not. The second is an annual timing question that becomes urgent in the year something happens. Both sit inside the wider Massachusetts founder playbook, alongside the corporate excise obligations the company itself carries.
Ed Parsons CPA handles the founder side of Massachusetts tax: election timing and filing discipline, estimated payments on unwithheld income, and modelling the surtax before an exit rather than after the wire lands, under the firm’s startup tax help service.
Where a past year was filed without the planning and an assessment has followed, a Business CPA Tax Resolution Case Analysis prices the exposure before anything is signed or paid.
