Can I pay federal tax with a credit card?

At a glance#

Why the fee decides everything#

Paying tax by card in the United States is possible, legal and routine, which makes it one of the few large payments where the points question has a clear answer. That answer comes from a single comparison, and on most cards it goes against the card.

The IRS does not accept cards itself. Payment runs through authorised processors, each of which charges a percentage of the amount as its fee, and the taxpayer pays that fee, not the agency. The fee is the entire subject. Everything else is a comparison between that percentage and the value of what the card returns.

The comparison has two inputs. The earn rate of the card and the value per point, multiplied together, give the return per dollar paid. If that product exceeds the fee, the payment produces a gain. If it does not, the payment costs money, and the size of a tax bill makes the loss larger. Put plainly, the card has to give back more per dollar than the processor keeps per dollar. The test is the same on a small bill and a large one; only the stakes differ.

Size is the second consideration. In many households a tax payment is the largest single transaction of the year, which is why the idea is attractive and why an error is expensive.

Debit cards change the picture. Processors charge them a flat fee instead of a percentage, and on a large payment that is dramatically cheaper. A debit payment earns nothing, but it also costs almost nothing, which makes it the obvious route for a taxpayer who wants the convenience of a card without any of the arithmetic.

State and local tax often follow the same model through comparable processors, and a few states charge noticeably more, so the comparison has to be made per jurisdiction. Record keeping differs too: the processor produces its own confirmation, and that confirmation, not the card statement, is the evidence of timely payment.

When it pays and when it does not#

Two cases decide the answer: the everyday one, where the fee simply exceeds the return, and the bonus one, where the fee buys something worth far more than points.

The everyday case#

On a card earning a single point per dollar the arithmetic fails. The fee is larger than the value of the points, and the gap widens with the size of the payment. A card with a high earn rate on general spending lands near break-even, and break-even with extra effort and a processor in the middle is no gain.

Cash-back cards with an unusually high flat rate are the exception. There the comparison can come out positive, but the margin is thin enough that the fee difference between processors matters. Fees are also republished each year, so a route that worked last April can be marginal this April without anything else changing.

The bonus case#

The clear case is a welcome bonus. When a minimum spend requirement is close and the deadline is near, the fee is the price of reaching the bonus, and the points hardly enter into it.

Paying that price is almost always worthwhile, because on a payment large enough to close the gap a bonus is worth a multiple of the fee, as welcome bonus value describes. The same logic applies to spending thresholds that unlock a benefit, for instance a free night certificate or an elite tier. The fee buys the threshold.

The bonus case also explains why the same household can reach opposite answers in two different years. With a bonus open, the payment is worth making. With none, the same card and the same processor turn it into a loss.

The reverse does not hold. Opening a card in order to pay tax by card rarely works out, because the bonus has to justify the annual fee as well. Nor is the payment a way to smooth cash flow: the card turns a tax debt into a card debt at card rates, the most expensive form of borrowing available for this purpose.

Worked example: fee against points#

A tax payment can be made through a processor, and six payment options are available.

The table holds the processor and the amount constant, so every difference in the result column comes from the payment method. Only the open welcome bonus is unambiguous. A bonus within reach turns the fee into an entry price.

The standard card loses in proportion to the payment, so a larger tax bill produces a larger loss. Scale does not rescue a bad comparison; it magnifies it. The high flat-rate card is the interesting one, because near break-even the decision turns on details: the processor chosen, whether the card counts the payment against a category cap, and whether the points have a redemption in sight at the assumed value.

Carrying the balance is the most expensive mistake in the table. Paying tax by card and leaving the balance open means paying card interest on a tax bill, as carrying a balance describes.

The debit card gets overlooked. A flat fee on a large payment is a rounding error, and for anyone who simply wants to pay by card instead of by bank transfer it is the sensible route.

The business card needs a moment of care. For a business tax payment the processor fee is typically a deductible expense, which lowers its effective cost and shifts the comparison in favour of the card. Deductibility belongs to the business payment, though, so a personal return paid on a business card does not become deductible.

What to check before paying#

Your own value per point and the actual processor fee are both easy to find, and with them the comparison takes one line. A few practical checks follow.

The processor. Fees differ, they change from year to year, and the difference applies to the entire amount.

The coding. The payment should post as a purchase, not as a cash advance. A wrongly coded transaction accrues interest immediately, as merchant category codes describes.

The frequency limit. Each processor caps the number of card payments per tax period, and splitting across processors is the usual workaround. The caps apply per period, so quarterly estimated payments each have their own allowance.

The timing. The due date is fixed, and what counts is the date the processor takes the payment. The closing date of the card statement plays no part.

The statement date. Paying just after a statement closes maximises the interest-free period, which is worth having even when the balance will be cleared in full.

None of these checks takes long, and all of them cost less than finding the answer on the next statement.

When it is not worth paying by card#

The route costs more than it returns in these cases:

• On a standard earn rate. The fee exceeds the value of the points on every amount.
• When the balance will be carried. Card interest dwarfs any reward.
• As a substitute for a payment plan. An IRS instalment agreement costs less than card interest.
• When the card codes it as a cash advance. Interest runs from day one, usually with no points.
• On cards with spending caps on bonus categories. A large tax payment consumes a cap that could have been spent where the earn rate is high, as bonus categories describes.
• On cards near their limit. A payment of this size can push utilisation to a level that affects a credit score for a month, which matters when an application is planned, as credit card application score describes.
• When a refund is expected. The payment comes back but the fee does not, so overpaying deliberately to chase a bonus is an expensive way to meet a threshold.

Joint filers with two cards are a partial exception. Splitting a payment across two cards to reach two separate bonus thresholds is possible within the frequency limits, and it is one of the few situations where the fee is paid twice on purpose. Each half of the payment then has to pass the comparison on its own, against its own threshold and its own fee.

What the same arithmetic covers#

The tax question is one instance of a general pattern. Every large payment offered with a percentage fee follows the same comparison: fee against earn rate times value per point.

Rent is the best-known other instance, and the arithmetic there lands in the same place, as paying rent by card describes. Tuition, property tax and utility bills through third-party portals belong to the same family, as do insurance premiums and association dues. Some charge a percentage, some a flat fee, and the flat-fee ones are occasionally worth it on large amounts.

Knowing the pattern removes the need to re-examine each case: two numbers, one comparison, one answer, and on a standard card the answer is usually no. The pattern is stable enough that a new case can be worked out without research, as annual fee math describes for the surrounding decision. Outside the narrow exceptions (a welcome bonus within reach, a threshold about to unlock, a deductible business payment or a flat debit fee), a bank transfer costs nothing and settles the matter.

The most common mistakes#

• Paying by card for the points on a standard earn rate. The fee is larger than anything the points return.
• Carrying the balance afterwards. Card interest exceeds every reward the payment earned.
• Using a card instead of an instalment agreement. The IRS agreement costs less than card interest.
• Not comparing processors. Their fees differ, and the difference applies to the whole amount.
• Ignoring the cash advance risk. On a large amount the coding is worth checking before paying.
• Overlooking the debit option. On a large payment a flat fee is the cheapest route of all.

Related topics#

• Bonus categories
• Paying rent by card
• Welcome bonus value
• Carrying a balance
• Merchant category codes
• Credit card application score