Financial Planner FAQ

This page explains how Prosper handles yearly projections, withdrawals, tax treatment, and common setup questions in plain language.

Educational use only. This is planning support, not tax or financial advice.

What does Prosper simulate each year?

Each year, Prosper updates income, spending, debt payments, and asset growth. If spending is higher than income, it covers the gap using your Spending Order.

How does Prosper cover a shortfall?

When yearly spending is higher than yearly income, Prosper uses your Spending Order to cover the gap. This tells the app what to use first, such as cash, savings, investments, or sellable assets. If one source is not enough, it automatically moves to the next.

When does Prosper apply taxes?

Taxes are applied only when assets are sold, such as for spending or required liquidation. Unrealized gains are not taxed. Taxes are off by default until you configure and enable them.

What do the tax treatments mean?

Standard taxes gains using your global tax rate. Tax-Free applies no tax on sale. Custom taxes gains using a custom rate for that asset. Tax-Deferred taxes the full withdrawn amount instead of only the gain.

What is cost basis?

Cost basis is what you originally paid for an asset. Prosper uses it to estimate how much of a sale is profit, so taxes can be calculated more realistically. If you leave it blank, the app uses the asset value at the time you created it.

Are savings withdrawals taxed?

Usually no. In many countries, savings interest is taxed when the bank credits it, not when you withdraw it. The savings growth rate you enter should already reflect that.

What's the difference between partial sale and full sale?

Use Partial sale allowed for assets you can sell in pieces, such as stocks, ETFs, or crypto. Use Full sale only for assets you would normally sell all at once, such as a house or car.

What happens if I sell a financed asset?

Financed assets are always sold in full. The sale proceeds first pay off the remaining linked liability. Only the amount left after that can be used for spending.

How do I fund a purchase by selling a specific asset?

When creating an asset, use Pay with and choose Asset if you want the purchase funded by selling another asset. In the purchase year, Prosper sells that selected asset first. If that is not enough, the remaining amount follows your Spending Order.

What does Max Cash Reserve do?

Max Cash Reserve sets the cash buffer you want to keep. Once cash reaches that level, extra surplus is redirected to Savings and Investments based on your allocation settings. It affects new surplus money only.

Why can cash go negative?

If all configured sources are exhausted and there is still spending left uncovered, Prosper shows the remaining gap as negative cash. This is a warning that the plan is not sustainable under the current assumptions.

How do Salary and Pension switch at retirement?

Before Retirement Age, Prosper uses Salary as income. Starting in the retirement year, it stops using Salary and uses Pension instead.

How can I set up house expenses?

Go to Pro > Assets / Liabilities / Cashflows and create a Cashflow in Outflow mode. Mark it as recurrent, choose monthly or annual frequency, and set the start age and term if needed. You can create separate entries for property tax, insurance, utilities, HOA, and maintenance, or group them if you prefer.

How do I track recurring subscriptions?

Go to Pro > Assets / Liabilities / Cashflows and create a Cashflow in Outflow mode with monthly frequency. You can create one entry per subscription or group them into one line item. Set the start age and term if the subscription should end later.

How can I set up a financed car?

Go to Pro > Assets / Liabilities / Cashflows, create an Asset, and set Payment Method to Financed. Add the down payment, financing rate, term, and payment frequency, then set the value change type to Depreciate.

How can I model retirement accounts?

Create one sellable asset for each retirement account, then choose the tax treatment that best matches when that account is usually taxed. As a rough guide, tax-free withdrawal accounts can use Tax-Free, accounts taxed mainly at withdrawal can use Tax-Deferred, and regular taxable accounts can use Standard or Custom. This is a planning approximation, not tax advice.

How should I use this tool safely?

Use realistic assumptions and compare multiple scenarios, such as best case, base case, and stress case. Small changes in growth, taxes, and spending can lead to very different long-term outcomes.

Ready to test your own scenario?

Install Prosper and simulate your profile, household, mortgage, and long-term investment plan with your own assumptions.