Tools · Vesting calculator
Work out what has actually vested
Grant size, cliff, and term in. Vested and unvested shares, the next vest date, and the full schedule out. Handles the cliff properly. Runs entirely in your browser — we do not log your inputs.
The grant
Position as of 11 Aug 2026
- Vested
- 18,000
- Unvested
- 30,000
- Next vest
- 1,000
- Fully vested on
- 15 Jan 2029
37.50%
62.50% still to come
15 Aug 2026
37 vesting dates in total
The 12,000-share cliff vested on 15 Jan 2026.
Vesting schedule
| Date | Month | Vesting | Cumulative | % vested | Status |
|---|---|---|---|---|---|
| 15 Jan 2026Cliff | 12 | 12,000 | 12,000 | 25.00% | Vested |
| 15 Feb 2026 | 13 | 1,000 | 13,000 | 27.08% | Vested |
| 15 Mar 2026 | 14 | 1,000 | 14,000 | 29.17% | Vested |
| 15 Apr 2026 | 15 | 1,000 | 15,000 | 31.25% | Vested |
| 15 May 2026 | 16 | 1,000 | 16,000 | 33.33% | Vested |
| 15 Jun 2026 | 17 | 1,000 | 17,000 | 35.42% | Vested |
| 15 Jul 2026 | 18 | 1,000 | 18,000 | 37.50% | Vested |
| 15 Aug 2026 | 19 | 1,000 | 19,000 | 39.58% | Upcoming |
| 15 Sept 2026 | 20 | 1,000 | 20,000 | 41.67% | Upcoming |
| 15 Oct 2026 | 21 | 1,000 | 21,000 | 43.75% | Upcoming |
| 15 Nov 2026 | 22 | 1,000 | 22,000 | 45.83% | Upcoming |
| 15 Dec 2026 | 23 | 1,000 | 23,000 | 47.92% | Upcoming |
| 15 Jan 2027 | 24 | 1,000 | 24,000 | 50.00% | Upcoming |
| 15 Feb 2027 | 25 | 1,000 | 25,000 | 52.08% | Upcoming |
| 15 Mar 2027 | 26 | 1,000 | 26,000 | 54.17% | Upcoming |
| 15 Apr 2027 | 27 | 1,000 | 27,000 | 56.25% | Upcoming |
| 15 May 2027 | 28 | 1,000 | 28,000 | 58.33% | Upcoming |
| 15 Jun 2027 | 29 | 1,000 | 29,000 | 60.42% | Upcoming |
| 15 Jul 2027 | 30 | 1,000 | 30,000 | 62.50% | Upcoming |
| 15 Aug 2027 | 31 | 1,000 | 31,000 | 64.58% | Upcoming |
| 15 Sept 2027 | 32 | 1,000 | 32,000 | 66.67% | Upcoming |
| 15 Oct 2027 | 33 | 1,000 | 33,000 | 68.75% | Upcoming |
| 15 Nov 2027 | 34 | 1,000 | 34,000 | 70.83% | Upcoming |
| 15 Dec 2027 | 35 | 1,000 | 35,000 | 72.92% | Upcoming |
| 15 Jan 2028 | 36 | 1,000 | 36,000 | 75.00% | Upcoming |
| 15 Feb 2028 | 37 | 1,000 | 37,000 | 77.08% | Upcoming |
| 15 Mar 2028 | 38 | 1,000 | 38,000 | 79.17% | Upcoming |
| 15 Apr 2028 | 39 | 1,000 | 39,000 | 81.25% | Upcoming |
| 15 May 2028 | 40 | 1,000 | 40,000 | 83.33% | Upcoming |
| 15 Jun 2028 | 41 | 1,000 | 41,000 | 85.42% | Upcoming |
| 15 Jul 2028 | 42 | 1,000 | 42,000 | 87.50% | Upcoming |
| 15 Aug 2028 | 43 | 1,000 | 43,000 | 89.58% | Upcoming |
| 15 Sept 2028 | 44 | 1,000 | 44,000 | 91.67% | Upcoming |
| 15 Oct 2028 | 45 | 1,000 | 45,000 | 93.75% | Upcoming |
| 15 Nov 2028 | 46 | 1,000 | 46,000 | 95.83% | Upcoming |
| 15 Dec 2028 | 47 | 1,000 | 47,000 | 97.92% | Upcoming |
| 15 Jan 2029 | 48 | 1,000 | 48,000 | 100.00% | Upcoming |
How this is calculated
- Nothing vests before the cliff
vested = 0 while today < grant date + cliff monthsNot a partial accrual, not a pro-rated tranche. Zero. Leaving the day before a one-year cliff means leaving with nothing. - The cliff releases everything accrued to that point
cliff shares = floor(grant × cliff months ÷ total months)A 12-month cliff on a 48-month schedule releases a quarter of the grant in one go. - After the cliff, tranches land on the chosen cadence
cumulative at month m = floor(grant × m ÷ total months)Each tranche is the difference between two cumulative figures, so rounding never drifts. - Month arithmetic clamps to the end of the month
31 Jan + 1 month = 28 Feb (29 in a leap year) - Termination stops the clock
vested = cumulative at the earlier of the as-of date and the termination dateUnvested shares are forfeited. Whether you can still exercise what did vest is a separate question set by the plan, usually within 90 days.
This models time-based vesting only. Performance conditions, acceleration on a change of control, and early-exercise grants all change the answer and are not modelled here.
Everything on this page runs in your browser. Nothing you type is sent to Glide, logged, or stored.
What this calculator does
Vesting is the schedule on which a grant becomes yours. Until a share or option vests you have a claim on the future, not an asset — leave, and the unvested portion goes back to the company. The standard employee schedule is four years with a one-year cliff and monthly vesting after it, which is what this tool is seeded with, but every input is editable.
The output gives you three things: what has vested as of a date you choose, when the next tranche lands and how big it is, and the complete schedule of every vesting date to the end of the term. If you set a termination date, the schedule splits into what vested before service ended and what was forfeited.
The one thing people get wrong: the cliff is a wall, not a ramp
Nothing vests before the cliff. Not a partial accrual, not a pro-rated tranche — zero. Someone who leaves eleven months and twenty-nine days into a one-year cliff leaves with nothing, and someone who leaves the following day leaves with a quarter of a four-year grant. That discontinuity is the entire point of a cliff, and it is the single most common mistake in home-made vesting spreadsheets, which tend to accrue monthly from day one and then “release” at the cliff. The totals match at the cliff date but every figure before it is wrong.
The second thing to watch is the date the schedule runs from. Grants almost always vest from a vesting commencement date, which is usually the employment start date, not the date the board approved the grant. Those can be months apart. Use the commencement date in the document.
Vesting is not the same as owning
For options, vesting only earns you the right to buy. You still have to exercise — pay the strike price — and there is usually a post-termination exercise window, commonly 90 days, after which vested options expire unexercised. Exercising can also trigger tax before there is any way to sell, which is a real and frequently unpleasant surprise. That is fact-specific: a CPA or securities lawyer should confirm your situation before you act on it.
This model covers time-based vesting only. Performance conditions, single- or double-trigger acceleration on an acquisition, and early-exercise grants with repurchase rights all change the maths. For the wider picture, read the vesting guide, and see how a grant fits into the whole picture in the cap table calculator. Nothing here is legal or tax advice.