Amendment to operating agreement
- Value of the company after the buy-in
- $125,000
- New member ownership, percent
- 20
- Member A ownership after, percent
- 40
- Member B ownership after, percent
- 24
Every figure on this page is computed from the inputs entered, by the method stated below it. LLC Lane publishes no clause text, no state fee, no tax rate and no vote rule: the thresholds and the set-asides are yours, and the defaults are a worked example to replace with your own figures.
The figures above start from a worked example ($125,000). Change any input and the answer updates as you type.
Download the Amendment to operating agreement worked example (CSV)
This is an amendment to operating agreement worksheet for the amendment most companies eventually make: a new member buys in. The agreed value of the company before the buy-in plus the capital the new member brings is the value after; the new capital over that value is the new member's share; and each existing member's share times the value before over the value after is their ownership after dilution. Every figure is yours, including the valuation; the worksheet publishes no clause text and no rule. Free, on the page, no account; the paid plan files every amendment against the company and the agreement it changes.
The value after the buy-in
An agreed value of $100,000 plus $25,000 of new capital is a company worth $125,000 after the buy-in, and that figure is the base every share is worked from. The valuation is the members' agreement, not the worksheet's; how it was reached belongs in the amendment's recitals.
The new member's share
New capital over the value after is the new member's ownership: $25,000 of $125,000 is 20%. If the members agreed a different share for the same money, the implied valuation is different, and the worksheet shows what the money buys at the valuation entered so the two can be reconciled before signing.
Everyone else, diluted
Each existing share times the value before over the value after is that member's ownership after: 50% becomes 40%, 30% becomes 24%, 20% becomes 16%, and the four shares add to 100. The amendment records the new schedule; the paid plan keeps it against the company with the old one it replaced.
Amendment to operating agreement: common questions
Is this a free operating agreement amendment template?
It is a free worksheet, not a template of clause text: enter the existing shares, the agreed value and the new member's capital, and it works the value after, the new member's share and each existing member's share after dilution on the page with no account and no card. LLC Lane Pro files every amendment against the company and the agreement it changes.
How is ownership diluted when a new member joins?
By the ratio of the company's value before the buy-in to its value after: a 50% member of a $100,000 company owns 40% once $25,000 comes in at that valuation. The worksheet works it for three existing members and the newcomer; a different agreed outcome means a different valuation, and the amendment records which.
What vote does an amendment need?
Whatever the existing agreement's amendment clause says, usually a share of ownership and sometimes every member. The worksheet decides nothing about the vote; the operating agreement and manager-managed worksheets on this site turn a threshold into the capital and the members it takes, and the paid plan keeps who signed.
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Amendment to operating agreement (Value of the company after the buy-in): $125,000, LLC Lane, worked example.
Cite as: "Amendment to operating agreement, LLC Lane", updated 2026-09-05, https://llclane.com/tools/amendment-to-operating-agreement/.