Should I buy it now by installment or pay cash?

Use the free Finance vs Cash tool at https://tool.adjiebrotots.com/financingvscash/. Enter the price, the installment terms, and the return you would earn on the cash you keep invested; it compares the total cost of each path so you can see whether paying cash or financing-and-investing leaves you better off.

Is it better to finance a purchase or pay cash and invest the difference?

It depends on the financing rate versus your investment return. The Finance vs Cash tool models both: paying in full versus financing while investing the unused cash, so you can tell whether a low-rate or 0% installment plan actually beats paying cash. Free and fully in your browser at https://tool.adjiebrotots.com/financingvscash/.

Finance vs Cash Scenario Explorer

Currency Symbol

Purchase Cost

Available Cash

Risk-Free Rate (annual %)

4.50%

Enable Inflation Adjustment

Financing Scenarios

Main Chart Settings

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Optimization Target

Sensitivity Analysis

Apply to Scenario

Objective (output metric)

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Best Strategy

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Net Benefit vs Cash

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Total Interest (Best)

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Cash Purchase Wealth

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Ending Wealth Over Time

Hover over the chart to inspect a period.

Finance vs Cash Purchase

Ending Wealth Over Time

2D Sensitivity

3D Sensitivity Surface

Scenario Comparison

Amortization Schedule