GP Co-Invest vs LP-Only Return Calculator — Rex's Toolbox

Rex says

Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.

Try a scenario

Click to load — tweak from there.

Inputs

LP capital invested($)

GP co-invest capital($)

Preferred return rate(%/yr)

Hold period(years)

Total distributable profit($)

GP promote above pref(%)

Result

GP blended total return (co-invest + promote)

199%

LP-only total return

70%

GP total dollar distribution

$397,727

LP total dollar distribution

$1,402,273

GP promote income only

$257,500

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How to use this

1Enter lp capital invested ($).
2Enter gp co-invest capital ($).
3Enter preferred return rate (%/yr).
4Enter hold period (years).
5Enter total distributable profit ($).
6Enter gp promote above pref (%).
7Read your gp blended total return (co-invest + promote) on the right — it updates as you type.
8Hit Share to keep the scenario or send it to someone.

About this calculator

Sponsors who put their own capital into the deal alongside LPs — GP co-investment, often 5-15% of total equity — earn both an LP-like return on that co-invested capital and the promote on the deal's overall performance, producing a blended return meaningfully higher than a pure LP earns on the same dollar invested. This calculator splits a total profit pool between the LP tranche and the GP's co-invested tranche, applies the preferred return and promote split to the GP's co-invest capital just like an LP position, then adds the GP's promote earnings on the LP capital to show the sponsor's total blended return versus a passive LP's return on the identical per-dollar investment. This is a useful lens for investors deciding whether to invest directly as an LP or negotiate a co-GP or joint-venture structure with more upside, since the gap between LP-only and GP-blended returns on an otherwise identical deal illustrates exactly what the promote is worth in dollar terms.

FormulaGP co-invest return = pref + promote share, same as LP formula applied to GP's own capital; GP promote income = LP profit above pref × promote%; GP blended return % = (GP co-invest distribution + GP promote income) ÷ GP capital invested.

Worked example

Using the values the calculator loads with:

Inputs

LP capital invested: 2000000 $
GP co-invest capital: 200000 $
Preferred return rate: 7 %/yr
Hold period: 5 years
Total distributable profit: 1800000 $
GP promote above pref: 25 %

Results

GP blended total return (co-invest + promote): 199%
LP-only total return: 70%
GP total dollar distribution: $397,727
LP total dollar distribution: $1,402,273
GP promote income only: $257,500

What each field means

Inputs

LP capital invested ($): The lp capital invested used in the calculation, measured in $. Starts at 2000000 $ so you have a working example on load.
GP co-invest capital ($): The gp co-invest capital used in the calculation, measured in $. Starts at 200000 $ so you have a working example on load.
Preferred return rate (%/yr): The preferred return rate used in the calculation, measured in %/yr. Starts at 7 %/yr so you have a working example on load. Accepted range: 0–15 %/yr.
Hold period (years): The hold period used in the calculation, measured in years. Starts at 5 years so you have a working example on load. Accepted range: 1–15 years.
Total distributable profit ($): The total distributable profit used in the calculation, measured in $. Starts at 1800000 $ so you have a working example on load.
GP promote above pref (%): The gp promote above pref used in the calculation, measured in %. Starts at 25 % so you have a working example on load. Accepted range: 0–50 %.

Results

GP blended total return (co-invest + promote): Returned as a percentage and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
LP-only total return: Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
GP total dollar distribution: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
LP total dollar distribution: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
GP promote income only: Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Why does the GP earn so much more per dollar invested?

The GP's co-invested capital earns the same pref and pro-rata upside as any LP dollar, plus the GP separately earns the promote on the entire deal's profit above pref — including the LP's much larger capital base — which is compensation for sourcing, underwriting, and operating the deal, not just for capital at risk.

Does more GP co-invest mean better alignment?

Generally yes — a sponsor with 10%+ of their own capital in the deal has more skin in the game than one contributing 1-2%, which is why many institutional LPs specifically require a minimum GP co-invest percentage as a condition of investing.

Can I negotiate a co-GP structure instead of a straight LP position?

On larger deals or with sponsors open to joint ventures, yes — bringing capital, a track record, or deal-sourcing capability sometimes earns a JV partner a slice of the promote rather than a pure LP position, which this calculator's GP-side math approximates for evaluating that trade.

Is this calculator's split realistic for a real deal?

It's a simplified proportional model; many real operating agreements have more nuanced provisions for how GP co-invest capital is treated in the waterfall, sometimes with the same pref and split as LPs, sometimes with different terms specified in the operating agreement. Check your specific PPM.

Accuracy and limitations

Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.

Related tools

Syndication Waterfall Promote Split Calculator

Model how profit splits between LPs and the GP through a preferred return waterfall.

Preferred Return Accrual Calculator

Track accrued and unpaid preferred return on an LP investment over time.

Syndication Sponsor Fee Load Calculator

Total up acquisition, asset management, and disposition fees an LP will pay a sponsor.

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APA

RevenueLab. (2026). GP Co-Invest vs LP-Only Return Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/gp-co-invest-vs-lp-return

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Source: [GP Co-Invest vs LP-Only Return Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/gp-co-invest-vs-lp-return) (2026).