Examined Oct 3, 2026 Paid as interest Terms updated Jul 1, 2026 The boost only attaches through an existing customer's link. Open cold and you get the standard rate, not the referral one.
Marcus publishes 3.50% APY as its standard Online Savings rate, dated October 3, 2026. When we first examined the page on July 24, 2026 it said 3.40%, so the base has moved up a tenth of a point since. The boost lifts today's rate to 4.50% APY for three months, after which it drops back. The boost's own value does not move with the base: one point for three months is a quarter of a point on whatever you hold, so ten thousand dollars earns twenty-five dollars extra whether the base reads 3.40% or 3.50%. Because this is a rate and not a payment, the balance you keep there is the whole story: about $25 on $10,000, about $2.50 on $1,000, and precisely nothing on an account you open and forget to fund.
- The standard Online Savings rate, as published on October 3, 2026 (it read 3.40% on July 24)3.50% APY
- The same account with the referral boost attached4.50% APY
One percentage point, for three months, and then the rate reverts to whatever the standard one is.
What pays what
| You, as a new savings customer arriving through a friend's link | +1.00% APY, 3 months |
|---|---|
| What the boost is worth on a $10,000 balance | About $25 |
| What it is worth on a $1,000 balance | About $2.50 |
| Opening an account cold, without anyone's referral link | No boost |
| Anyone who held a Marcus savings account or CD in the last 12 months | Not eligible |
| A CD, at any balance | Not eligible |
| A new joint account where any owner is not a new customer | No boost |
Do this, in this order
- Find someone who already banks with Marcus. This reward only exists if you arrive through an existing customer's referral link. Open an account straight off the Marcus website and you get the ordinary rate and no boost at all. We hold no Marcus link, so if you do not know a Marcus customer, the plain 3.50% is what you are deciding on.
- Check the twelve month rule before anything else. Marcus counts you as a new customer only if you have not had a Marcus savings account or a Marcus CD at any point in the last twelve months. A closed account from last spring is enough to disqualify you.
- Open savings, not a CD. CDs are excluded from the boost. A CD, or certificate of deposit, locks your money up for a fixed term in exchange for a fixed rate, and it earns you nothing here no matter how it is funded.
- On a joint account, check every owner first. Marcus says a new jointly owned account opened through a referral link can receive the boost “provided that all account owners at the time of account opening are New Customers”. One owner who had a Marcus savings account or CD in the last twelve months is enough to lose it.
- Do the arithmetic on your own balance before you move anything. One percentage point for three months is a quarter of a percent of whatever you actually hold. Multiply your realistic balance by 0.0025 and you have your answer in dollars, and that sum does not change when the base rate moves. If that number does not justify the afternoon, this is not your offer.
The fine print that decides whether it is worth anything
A rate boost fails differently from a cash bonus. Nobody withholds it; it just turns out to be worth less than you assumed, or to land on the wrong person.
The reward scales with your balance, so a small saver gets a small reward. At $2,000 the boost is worth about five dollars across the whole three months. It only starts to matter in the tens of thousands, and even at $50,000 it is roughly $125.
The clock is three months, and it does not warn you. The boosted rate applies for three months and then reverts to whatever the standard rate is at that moment. There is no cliff edge to notice on a statement, so put the end date in your calendar on day one.
A joint account needs two new customers. The boost reaches a new joint account only if every owner counts as new when it is opened, so check both histories before you apply together.
The base rate underneath is variable. The boost is expressed as one point on top of the standard rate, not as a guaranteed 4.50%. Savings rates are variable by design, and Marcus can move the base whenever it likes, during your boost as well as after it: it did so between July 24 and September 24, 2026, when the standard rate went from 3.40% to 3.50%.
It arrives as interest, so it is taxed as interest. This reward shows up in the interest your account earns, and interest is taxable income that banks report.
If you refer friends yourself later
Marcus lets you hold up to five boosts at a time, and they run one after another rather than stacking: one is active on your account while up to four wait their turn. Once you hold five, you wait for one to expire before you can earn another.
Is it worth your time?
The current terms pay in rate, not checks, and what that adds up to is fine on its own terms. If you already keep an emergency fund in a savings account, a friend's link gets you 4.50% instead of 3.50% for a quarter of a year, which on $10,000 is about $25 for perhaps twenty minutes of work. What it is not is a bonus worth chasing. If you were hoping to open an account, collect a payment, and move on, the current Marcus terms offer no such thing, and the offers below still pay in actual money.
