US Tax Tools

Partnership Basis Calculator

Build a partner-level outside-basis worksheet from contributions, allocations, distributions, and liability changes.

01INPUTS
Partner Outside Basis Worksheet
02RESULTS
Estimated ending outside basis: $39,000.

Ending outside basis

$39,000

Currently allowed loss

$10,000

Basis-suspended loss

$0

Excess distribution gain

$0

This is a general §705/§733 worksheet. At-risk, passive-loss, §754, hot-asset, built-in gain, and property-distribution rules can change the result.

Share
Edit inputs ↑

What this tool covers

Calculation scope

  • Treats a liability decrease as a deemed cash distribution.
  • Caps the current loss at outside basis.
  • Shows excess-distribution gain and suspended loss separately.

Frequently asked questions

Is outside basis shown on Schedule K-1?

Usually not. The partnership reports tax-capital information, but each partner is responsible for maintaining outside tax basis.

Can basis fall below zero?

No. A cash distribution exceeding outside basis generally triggers gain instead, and a loss exceeding basis is suspended.

Does basis make every loss deductible?

No. At-risk, passive activity, excess business loss, and other rules apply after the basis limitation.

Sources

Related Calculators

Last updated August 11, 2026 Tax year 2025 return and 2026 partnership planning

Data sources: IRS Publication 541; IRC §§705, 731, 733, and 752

This tool is general information only, not financial advice.

Federal planning estimate based on current IRS forms and instructions. Use the filed form and its instructions for return preparation.

Reviewed by USTax Tools Editorial Desk

Read our methodology →