Calculator

Find your optimal card setup.

Most people have the wrong combination of cards. Enter your monthly spending and the OneCard engine finds the 1, 2, or 3-card wallet that earns you the most — net of every annual fee.

How the optimizer works

The engine scores every card in the catalog on your exact spend profile, converting all point multipliers to a single cash-equivalent rate. It then selects the anchor card with the highest net annual value, and iteratively finds the add-on card that recovers the most "leaked" rewards on categories where the anchor underperforms — always net of annual fees.

Why a single card usually isn't enough

No single card dominates every category. A card earning 4% on dining earns 1% on groceries. The optimizer quantifies exactly how much you'd gain by adding a specialist card and whether the annual fee of that second card is worth it for your specific spending mix.

The web estimate vs. the app

This calculator runs on your estimated spending. The WalletFlo app connects to your actual transactions via Plaid, runs the same optimization on your real history, and updates your recommendations every week — surfacing the exact dollar value of every card swap it recommends.

Questions

What is the best credit card combination?

It depends entirely on your spending mix. Enter your monthly spend by category and the optimizer will show you the combination that earns the most for your specific situation.

Is a 2-card or 3-card wallet better?

A 2-card wallet is usually the sweet spot. A 3rd card only adds real value when it earns significantly more on a large category that your first two cards both underperform on.

Does this account for annual fees?

Yes. All results are shown net of annual fees. A high-fee card only appears in the optimal combo if its rewards more than offset the fee.