What-If Scenarios and Consolidation Modeling in WIMM

The hardest part of paying off debt is not the math. It is the deciding. Should you throw the tax refund at the highest-rate card or the smallest balance? Is that balance-transfer offer actually a good deal once you count the fee? Would an extra fifty dollars a month even matter? Most people answer these questions with a gut feeling and a vague hope. WIMM's What-If tools let you answer them with a number, before you commit a single dollar.

A forked path in a forest, the choice between two routes

Drag a slider, watch the future move

The centerpiece of the What-If tools is the extra-payment slider. It runs from nothing up to a couple thousand dollars a month, in small steps, and as you drag it the payoff date updates live. No reload, no recalculate button. Right beside it WIMM shows the months saved and the interest saved versus paying only the minimums. You see, in real time, what an extra thirty or eighty or two hundred dollars a month actually buys you.

That live feedback turns an abstract intention ("I should pay more") into a concrete trade ("forty dollars a month pulls my payoff in by fourteen months"). It is much easier to commit to a number you have watched move the date.

Model a refund, a bonus, or a raise

Real money does not always arrive as a tidy monthly amount, so the What-If tools cover the lumpy kinds too.

Tax refund check and cash representing a lump sum debt payment

A one-time lump sum input models a tax refund or a bonus. Enter the amount, and WIMM shows how a single big hit reshapes the whole payoff curve and how much interest it saves.

A monthly income increase input models a raise. If you start earning more and route part of it to debt, this shows what that steady bump does to your payoff date over the long haul.

And a "pay off by" date picker flips the whole question around. Instead of asking "if I pay X, when am I done?", you pick the target month and WIMM computes the exact extra monthly payment you would need to hit it. That is the question most people actually carry in their heads ("I want this gone before the baby arrives"), and it is the one most debt tools cannot answer.

You can even add hypothetical debts you have not saved, to game out "what if I finance this purchase?", or toggle to model only those hypotheticals on their own.

Strategy comparison: see the trade-offs side by side

There is no single right way to attack debt, so WIMM lays the options out together. The Strategy comparison shows four approaches at once:

Avalanche, highest interest rate first. Mathematically the cheapest.
Snowball, smallest balance first. Fastest visible wins, best for momentum.
Hybrid, a few quick wins and then avalanche. A blend of motivation and math.
Minimum-only, the baseline. What happens if you change nothing.

Person reviewing debt payoff strategy options on paper

For each one you see the payoff date, the total interest, the total paid, and the payoff order (which debt falls first, second, third). Each strategy is badged with the time saved and interest saved against the minimum-only baseline, so the cost of doing nothing is impossible to miss. You can pick the strategy that fits your temperament with your eyes open about what it costs.

The Consolidation Modeler: is that offer real?

Balance-transfer and consolidation offers are designed to look attractive. A lower rate, one tidy payment. The catch is almost always the fee, and the fee is easy to wave away. The Consolidation Modeler refuses to let you wave it away.

It needs at least two debts to model against. You enter the new rate, a term in months, and a balance-transfer fee, and WIMM shows a before-and-after on the three numbers that matter: monthly payment, total interest, and payoff date. Then it computes the break-even month, the point where the interest you save from the lower rate finally offsets the fee you paid to get it.

Crucially, if the consolidation would actually cost you more than staying put, WIMM says so plainly. It does not assume the new offer is automatically better, the way the offer's own marketing does.

Tip

When a balance-transfer offer lands in your mailbox, run it through the Consolidation Modeler and look at one number: the break-even month. If you will pay the balance off before you reach break-even, the fee never pays for itself and the offer is a worse deal than it looks. If you comfortably clear break-even with months to spare, the savings are real. That single figure cuts through the glossy 0% headline faster than any pitch can.

How this compares to other tools

This is a genuine WIMM strength, not a me-too feature. YNAB and Monarch, both excellent at what they do, do not ship built-in debt what-if modeling. You can track debt in them, but you cannot sit down, drag a slider, and watch your payoff date move, and you certainly cannot stress-test a balance-transfer offer against its break-even month. For that, people usually fall back to a spreadsheet or an online calculator that knows nothing about their actual debts. WIMM puts the modeling right next to your real numbers.

Free to model, with a couple of Premium add-ons

Here is the honest tier line. All of the modeling is free for every WIMM user, and not just in the demo. The extra-payment slider, the lump sum, the income increase, the "pay off by" date picker, the hypothetical debts, the strategy comparison, and the Consolidation Modeler with its break-even math all work in the live app at no cost. You can run every one of these on your real debts today without paying.

What Premium adds on top is narrow and honest: saving and naming scenarios to compare later (Save and Compare, so you can keep "the refund plan" and "the aggressive plan" side by side over time), plus the AI strategy and negotiation advice. The modeling itself is free.

The quickest way to play with all of it first is the demo, which opens straight into the Debt Reducer with a sample household and debts already loaded: app.wimm.money/demo?mode=debt. Drag the slider, compare the strategies, and run an imaginary balance transfer through the modeler before you ever run a real one.