The extra interest on $10,000 at a two-percentage-point spread is $200 over a full year. A new $395 annual subscription costs almost twice that. At $25,000, the extra interest becomes $500, leaving a $105 advantage before tax.
Those two examples capture the subscription decision better than the 6% headline. The benefit scales with balance; the fee starts with the plan you buy.
Pricing and rate snapshot checked October 11, 2026. The U.S. web list price is $395 annually or $40 monthly. Checkout taxes, platform pricing and actual upgrade charges may differ. X pricing
Decide which expense is yours
- Expense to compare
- Full new subscription cost
- Expense to compare
- Additional expense caused by the savings decision, potentially $0
- Expense to compare
- Actual incremental upgrade charge
- Expense to compare
- The cost of retaining it
- Expense to compare
- No additional savings yield from the paid route
The X Money review establishes which rate applies. Do that check before calculating a subscription break-even.
If your interest is already at the higher rate, the rate difference from buying Premium+ is zero. There is no balance at which extra savings interest pays for that purchase. Other benefits can still matter, but they are a separate valuation.
The one-year threshold
Dated illustration · October 11, 2026
The cost of buying two extra percentage points
$10,000 balance
−$195
$200 extra interest less a $395 annual fee.
$19,750 balance
$0
$395 extra interest matches the annual fee.
$25,000 balance
+$105
$500 extra interest less the annual fee, before tax.
For one year with a constant balance and retained interest:
Break-even balance = additional subscription cost ÷ APY advantage.
- APY advantage in this snapshot
- 2.00 percentage points
- Balance covering a new $395 fee
- $19,750
- APY advantage in this snapshot
- 2.50 percentage points
- Balance covering a new $395 fee
- $15,800
- APY advantage in this snapshot
- 2.90 percentage points
- Balance covering a new $395 fee
- About $13,621
These are derived pre-tax thresholds, using the same dated observations as the bank comparison. They assume the relevant rates stay unchanged for the full year. They exclude optional withdrawal costs, rewards and promotional boosts.
Compare Premium+ with every rate you can actually qualify for, including the deposit boost.
Taxes raise the threshold
Bank-account interest is generally taxable. The IRS explanation sets out the basic treatment. This model applies a supplied marginal tax rate to interest and does not assume a personal subscription is deductible.
At a hypothetical 24% marginal rate, a $500 extra-interest benefit leaves $380 after the modeled tax. Against a $395 fee, that is a $15 shortfall. The $25,000 balance that wins before tax therefore loses under this assumption.
The simplified threshold becomes $395 ÷ [0.02 × (1 − 0.24)], or about $25,987. Your actual marginal rate may differ.
Three months is not a quarter-price annual subscription
Your savings, in dollars
Does the extra interest pay for the plan?
Individual accounts only. Rates from the October 11, 2026 research snapshot; review due October 18. No login or saving of inputs.
Confirm residence and account eligibility before comparing interest.
Formulas, assumptions and sources
Flat-rate interest = balance × [(1 + APY / 100)^(months / 12) − 1]. Net benefit = interest × (1 − tax / 100) − subscription. Taxes are applied at the end; no subscription deduction is assumed. Fees are paid outside the savings balance.
A new annual plan charges full years upfront, including renewals: $395 × ceiling(months / 12). A new monthly plan charges $40 × months. For an existing plan or upgrade, use the actual extra cost for the whole period; zero is appropriate only if this decision adds no expense.
Rates and qualification stay unchanged. No contributions, withdrawals, bonuses, card rewards, optional transfer fees or value of other subscription features. SoFi paid Plus uses daily reinvestment across the individual $20,000 cap with $10 monthly fees; actual crediting can differ. Joint accounts and downgrade timing are not modeled. Confirm your actual fees, eligibility and credited APY.
- X rates · July 27, 2026
- X subscription prices · Checked October 11, 2026
- Marcus · October 11, 2026
- Ally · October 8, 2026
- SoFi rate sheet · September 23, 2026
- SoFi Plus price · Checked October 11, 2026
- Chime · October 6, 2026
For a short stay, APY must be converted to period growth. The model uses compounded growth over the chosen months; it does not treat a 6% APY as 6% every quarter.
It also charges a full new annual purchase for a period under a year. A monthly plan can reduce the upfront commitment, while costing more over twelve months. For an existing plan, enter the actual additional fee for your entire comparison period.
A better decision than “the highest rate wins”
At a small balance, an unpaid qualifying tier may produce more cash than a paid headline rate. At a larger balance, the paid route can justify its cost, but rate changes and the way you move money can still reverse the result.
Use the calculator’s result as a conditional estimate. If the inputs become stale, it withholds a preferred outcome. Check your provider terms again before purchasing or moving money.
For broader account choices, read X versus Marcus and Ally and X versus SoFi and Chime.
Sources
Checked October 11, 2026: X U.S. web pricing, X rate schedule, and IRS Topic 403. Rates and prices may change. Subscription features outside savings are assigned no value in these calculations.
Frequently Asked Questions
What is the one-year break-even versus X standard?
Should I subtract the whole fee if I already subscribe?
Does paying monthly mean the annual cost is $395?
What should I do after reading Is X Premium+ Worth Buying for the Savings Rate??
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