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Portfolio Valuation Calculator

Estimate the sale value of your residual portfolio based on monthly income, attrition, and market multiples.

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What Is a Residual Portfolio Valuation?

A residual portfolio valuation estimates what a buyer would pay for your stream of monthly residual income. In the ISO and payment processing world, residual portfolios are actively bought and sold like any income-producing asset. The valuation hinges on three factors: your current monthly residual, the attrition rate (how fast you lose merchants), and the market multiple buyers are willing to pay. Low-attrition portfolios with diversified merchant bases and transferable processor agreements command premiums of 36-48x monthly residual. High-attrition portfolios with concentrated risk sell for 18-24x. Run the numbers to see what your book is worth today -- and what it could be worth if you cut attrition by even 1%.

How to Use This Calculator

Enter your current monthly residual

Use the actual number from your most recent processor statement. Do not include one-time bonuses or commission income -- only the recurring residual payment.

Estimate your monthly attrition rate

Count the number of merchants who stopped processing in the last 12 months, divide by 12, then divide by total merchants. Industry average is 2-4% monthly. If you do not track this, start now -- it is the single biggest factor in valuation.

Select a valuation multiple

Multiples depend on the buyer market. In 2025, clean portfolios with sub-2% attrition sell at 36-48x. Portfolios with 4%+ attrition sell at 18-28x. Use the comparison table to see sensitivity across multiples.

Key Concepts

Valuation Multiple

The multiplier applied to monthly residual to determine portfolio sale price. A $5,000/month portfolio at 36x is worth $180,000. Higher multiples indicate lower perceived risk.

Attrition Rate

The percentage of merchants who stop processing each month. This is the primary driver of multiple compression -- a 1% improvement in attrition can increase your multiple by 6-10x.

Transferability

Whether your processor agreement allows you to transfer or sell your residual stream. Non-transferable agreements are nearly worthless for sale purposes. Always confirm transferability before building a portfolio.

Expert Insights

Build to Sell, Even If You Never Do: Treating your residual portfolio as a saleable asset forces better business decisions: you board quality merchants, maintain relationships, track attrition, and ensure your processor agreement is transferable. These same practices maximize income whether you sell or hold. The most successful ISOs build with an exit in mind from day one.

Timing the Sale: Portfolio multiples fluctuate with M&A activity in the payments industry. When large acquirers (Fiserv, Global Payments, Worldpay) are actively consolidating, multiples expand. During credit tightening, multiples compress. Track industry M&A news and consider selling during high-multiple windows rather than waiting until you need to exit.

Frequently Asked Questions

In the current market (2025-2026), 30-40x monthly residual is considered solid for a well-maintained portfolio with sub-3% attrition and a transferable processor agreement. Premium portfolios with major processor relationships and very low attrition can command 42-50x.

Quarterly merchant check-ins, proactive rate reviews (offer a small reduction before they shop), statement analysis to catch processing issues early, and value-added services (POS upgrades, chargeback management) are the most effective retention tools. Each 1% reduction in attrition can add 6-10x to your multiple.

Yes. Partial portfolio sales are common. You can sell a subset of merchants or sell a percentage of your residual stream while retaining ownership. This is useful for raising capital without exiting entirely. Partial sales typically command a slightly lower multiple (2-5x less) than full portfolio sales.

Results are estimates for educational purposes only. Actual amounts may vary based on your specific financial situation, market conditions, and other factors. This calculator does not constitute financial advice.