CARDIER vs. a Spreadsheet: What Actually Gets Tracked

The premium cardholders who track their credits at all mostly track them in a spreadsheet. If you found this page, there is a reasonable chance one is open in another tab. The honest question is not whether CARDIER beats every spreadsheet — some are excellent — but whether the specific spreadsheet in the other tab is still doing what its owner needs it to do. This piece is a direct comparison, not a sales pitch. There are places the spreadsheet still wins.

What the spreadsheet does well

A good credit-tracker spreadsheet has a real advantage over any app: it is completely under the owner’s control. Custom columns, custom formulas, custom logic for edge cases. If a specific credit does not fit the standard rules — a promotional bonus, an issuer offer, an odd overlap — the spreadsheet just gets another row. No feature request, no update cycle.

Spreadsheets also handle household setups gracefully. Two cardholders, four cards, cross-linked authorized users? A single sheet with a name column solves it. Most apps assume one wallet per user.

And spreadsheets are private in a way apps mostly cannot claim. The data lives on your device. Nothing gets synced anywhere unless you decide it does. For the subset of cardholders who care most about that, the spreadsheet is genuinely a better fit than any hosted product.

Where spreadsheets quietly break

The problem is not what a spreadsheet can do. It is what a spreadsheet cannot do without maintenance. Three specific failure modes come up over and over.

1. The calendar layer

A spreadsheet does not know what today is unless it is opened. If the cardholder does not open the sheet in a given week, the sheet does not raise a flag. There is no notification when a credit is about to expire. There is no interrupting signal at any point in the workflow.

This is fine as long as the cardholder opens the sheet regularly. In practice, most spreadsheets get a heavy edit in January, another in March, and then drift. By November, the sheet is either accurate but forgotten, or actively wrong because it was not updated. Both failure modes end in credits going unclaimed.

2. The catalog upkeep

Card issuers update their benefit terms multiple times a year. A merchant gets added to an eligible list. A monthly credit changes from Uber to Uber One. A dining partner is dropped. A new statement credit is announced as a mid-year addition.

In the spreadsheet, these updates are the owner’s job. They get caught only if the cardholder happens to read the issuer’s email or stumbles across an update on a rewards site. Missed updates create the worst kind of spreadsheet error: rows that look tracked but are silently obsolete. The credit that never fires because the merchant list changed eight months ago is not going to show up in the tracker until year-end surprises the cardholder.

3. The what-if math

“Which card should I use at this restaurant right now?” is not a question a spreadsheet answers well. To use the spreadsheet for that, the cardholder has to look up the row for each card in the wallet, remember the bonus rate, factor in whether the specific merchant qualifies, and make the call in the couple of seconds it takes to tap or swipe. In practice, nobody does this. They reach for the card they usually reach for. Which is the card that has always had the highest rate for the category — even if a new addition or a promotion has changed the calculation.

Similarly for the renewal question. The spreadsheet holds all the data. But calculating “is this card worth keeping this year” requires running a set of formulas that most cardholders build once and never revisit. If the pattern of spending has changed since the sheet was set up, the answer the sheet gives is going to be a year or two out of date.

Where the two are actually similar

For year-end capture rate on the big calendar-year credits — the airline credits, the hotel credits, the Saks half-year splits — a well-maintained spreadsheet and CARDIER produce approximately the same outcome. Both rely on the same underlying information; both surface the same deadlines; both nudge (well, CARDIER nudges, and the spreadsheet nudges only if the owner remembers to look). The difference is not the tracking accuracy — it is the friction of using them.

Any cardholder who reliably opens the spreadsheet twice a month is capturing roughly the same value as a CARDIER Pro subscriber. The cardholders who do that are a smaller group than the ones who intend to.

What CARDIER adds specifically

Concretely, the pieces of the workflow that CARDIER handles and a spreadsheet does not:

• Notifications with a real deadline. Push notifications before a credit expires, with the amount and the specific date. The spreadsheet has the deadline in a cell; CARDIER puts it on the lock screen.
• A continuously updated catalog.When Amex changes an eligible-merchant list or Chase adjusts a category, the update lands in CARDIER automatically. In the spreadsheet, the update is the cardholder’s to catch and enter.
• Card Advisor at the register.A one-tap answer to “which card here?” that reads the current merchant category, the active promotions, and the wallet composition. Faster than looking at a phone spreadsheet, more accurate than intuition.
• Renewal math on the current data. The captured-value- against-fee calculation is always current. Thirty days before the anniversary, CARDIER runs the numbers. In the spreadsheet, that answer is only as fresh as the last time the owner sat down and thought about it.
• Overlap detection across the wallet.Two lounge memberships, two airline credits — the specific redundant benefits that mean one card’s fee is not earning its keep. Doable in a spreadsheet, but rarely done. See our portfolio strategy piece for the framework.

Which one should you use

Honest answer, no marketing:

Keep using your spreadsheet if it is currently up to date, you have a reliable habit of opening it, and your setup is unusual enough that no app is likely to model it well. Household with authorized users across four issuers, a stack of promotional offers layered on top of the base benefit set — the spreadsheet will bend to that; an app will not.

Consider CARDIER if the honest read on the spreadsheet is that it was set up in 2024 and last touched in April, if the cardholder can name three credits that expired unnoticed last year, or if the wallet has grown to three or more premium cards. That third card is where the cognitive cost of the spreadsheet approach usually stops being worth the control.

Use both if the situation calls for it. CARDIER handles the standard capture and calendar work; the spreadsheet handles the odd promotions and the household-level ledger. There is nothing wrong with a spreadsheet in a supporting role — the failure mode is only when it is expected to do everything on its own.