A low water mark annuity is a fixed indexed annuity that credits interest based on how much the linked index rose from its lowest sampled point during the term, rather than from where it started. The design can produce a larger credited gain in a volatile market that dips and recovers, because the measurement begins at the trough instead of the opening value. The same contractual limits found on any indexed annuity still apply: caps, participation rates, and spreads trim the upside, and a zero-percent floor keeps index losses from reducing your principal.
How the Crediting Method Works
Most indexed annuities use point-to-point crediting, comparing the index on the first day of the term to the index on the last day. The low water mark (LWM) method ignores the starting value. The insurer tracks the index on set observation dates through the term, identifies the lowest of those sampled values, and calculates the percentage gain from that low point to the ending value.
Here is what that looks like in numbers. The index opens a one-year term at 5,000. It drops to 4,500 during the year and closes at 5,400. Point-to-point would show an 8% gain, from 5,000 to 5,400. LWM discards the 5,000 starting point and measures from 4,500 to 5,400, a 20% raw index gain. That raw number then runs through the contract’s caps and participation rate before anything is credited, but the base measurement is meaningfully larger.
The “lowest point” is the lowest of the sampled observations, not necessarily the absolute intraday low. Contracts commonly sample at month-ends or on policy anniversaries within the term, and the exact schedule is spelled out in the contract.
When the Method Actually Helps
LWM does its best work in a V-shaped market. A sharp early drop creates a deep trough, and any recovery from that trough is measured as gain. If the year contains a real selloff followed by a rebound, the raw index number the insurer starts with is well above what point-to-point would produce.
In a steadily rising market, the advantage largely disappears. If the index climbs from 5,000 to 5,400 and its lowest sampled value along the way is 4,980, the LWM base is barely below the starting point, and the credited return is close to what point-to-point would have delivered.
There is one narrow scenario worth understanding. If the index ends below where it started but above its lowest sampled point, LWM can still produce a positive index gain where point-to-point would show a loss. Point-to-point would credit zero because of the floor; LWM could credit a small positive amount. It is an edge case, but it shows how the method rewards even a partial recovery.
What Limits the Credited Return
The raw gain from the LWM calculation is not what shows up in your account. Insurers apply one or more of the following to every indexed annuity, and they can be stacked on the same contract.
- Participation rate: the percentage of the index gain that flows through to your calculation. A 20% raw gain with a 50% participation rate becomes 10%. Contracts tied to well-known benchmarks like the S&P 500 tend to carry lower participation rates than those linked to volatility-controlled custom indexes, where rates can exceed 100%.
- Cap rate: the maximum interest the contract can credit in a term. If the participation-adjusted gain is 10% and the cap is 7%, you receive 7%. Annual caps commonly fall in the 3% to 7% range, shifting with interest rate conditions.
- Spread or margin: a flat percentage subtracted from the index gain. A 15% gain with a 3% spread leaves 12%. Some contracts use a spread instead of a cap; others use both.
These limits are how the insurer funds the guarantee and pays for the hedging behind it. You give up part of the upside so that market losses cannot reduce your contract value. Whether that trade feels fair depends on the market you end up in. In a year the S&P returns 20%, a credited 5% will feel restrictive. After a 30% drawdown, a zero looks very different from a portfolio loss.
The Zero-Percent Floor
If the index performs badly enough that the LWM calculation would produce a negative number, the contract simply credits zero for that term. Your account value does not go down because of index performance. The floor does not protect against surrender charges, rider fees, or inflation, but the linked index cannot pull your balance below what it was at the start of the term.
Term Length and Annual Reset
The term is the window over which the LWM calculation runs. Terms typically range from one to ten years. On a one-year term, the insurer measures the low point and ending value every 12 months, credits any interest, and begins a fresh term. Longer terms give the calculation more time to find a deep trough, but they also delay any crediting and delay the lock-in of gains.
Most contracts include annual reset. Credited interest becomes part of your protected principal at the end of each term, and the index starting point for the next term resets to the current value. Gains from a good year cannot be erased by a bad year that follows.
Getting Money Out
Indexed annuities are built for long holding periods, and the surrender schedule enforces that. Surrender periods commonly last six to eight years. A typical schedule might start at 6% in the first year and drop by one percentage point each year until it reaches zero.
Most contracts allow a penalty-free withdrawal of up to 10% of the account value each year. That is limited liquidity, not everyday access. Any amount above the free withdrawal allowance triggers the surrender charge on the excess.
Health-Related Waivers
Many contracts include riders that waive surrender charges in a serious health situation. A nursing home waiver commonly requires confinement of at least 90 consecutive days in a qualifying facility, with the first confinement beginning after the first contract anniversary. A terminal illness waiver typically requires a physician’s diagnosis of a condition expected to result in death within 12 months. Both usually require written proof, and some insurers reserve the right to a second medical opinion. Exact qualifying conditions vary by contract.
How Withdrawals Are Taxed
Earnings inside a deferred annuity grow tax-deferred; you owe no income tax until money comes out. When you withdraw from a non-qualified annuity, the IRS treats earnings as coming out first. Every dollar is taxable as ordinary income until all accumulated earnings have been distributed. Only then do withdrawals come from your original contributions, which are not taxed again.
This ordering rule sits in Section 72(e) of the Internal Revenue Code. Amounts received before the annuity starting date are included in gross income to the extent they are allocable to income on the contract, meaning the excess of the contract’s cash value over your investment in it.
The 10% Penalty Before 59½
Withdrawing taxable earnings before age 59½ generally triggers an additional 10% penalty tax on the taxable portion, on top of ordinary income tax. The penalty is codified in Section 72(q). Exceptions include distributions after the owner’s death, distributions due to disability, and a series of substantially equal periodic payments over the owner’s life expectancy.
Moving From One Annuity to Another
Section 1035 permits a tax-free exchange of one annuity contract for another, provided the transfer goes directly from the old insurer to the new one and the owner stays the same. A 1035 exchange does not reset the surrender period on the old contract. If you are still inside that period, you will likely pay a surrender charge on the outgoing contract, and the new contract starts its own surrender schedule. Your cost basis carries forward, so you are not taxed twice on the same contributions. Confirm the features of the new contract justify restarting a surrender clock before moving.
RMDs on Qualified Money
If the annuity sits inside a traditional IRA or 401(k), required minimum distributions apply. Under the SECURE 2.0 Act, individuals born between 1951 and 1959 must begin RMDs in the year they turn 73. Those born on or after January 1, 1960 must begin at 75. The first RMD must be taken by April 1 of the year after you reach the applicable age; all subsequent RMDs are due by December 31. Delaying the first distribution to April 1 means two RMDs land in the same calendar year. Missing an RMD triggers a 25% excise tax on the shortfall, dropping to 10% if corrected within two years.
Annuity RMDs can be tricky because the account value used to calculate them may include pending interest that has not yet been credited. Confirm the annual figure with the issuing insurer. Taking an RMD during the surrender period can also exceed the free withdrawal allowance and trigger a surrender charge.
If the Owner Dies
If the owner dies before annuitizing the contract, most contracts pay a death benefit to the named beneficiary. During accumulation, that benefit is typically equal to the account value: premiums paid plus credited interest, minus prior withdrawals and fees. Enhanced death benefit riders are available on some contracts for an additional cost. Named-beneficiary proceeds avoid probate but remain subject to income tax on the earnings portion.
Insurer Backing
Annuities are not FDIC-insured. State life and health insurance guaranty associations provide a backstop if an insurer becomes insolvent, with coverage limits that vary by state. Check your state’s specific limits before committing a large premium to a single insurer, since the company’s financial strength is what stands behind a decades-long contract.
Who the Product Fits
A low water mark annuity fits someone who wants exposure to index-linked returns, cannot accept the possibility of losing principal, and expects enough market volatility during the term for a real dip to occur. The LWM method rewards patience through choppy stretches where a point-to-point method would credit little.
It is a poor fit for anyone who may need the money within six to eight years, and for investors who would rather ride out drawdowns and keep the full upside. Caps and participation rates guarantee that in a strong bull market, the credited return will trail a plain index fund by a wide margin. It also should not be a person’s only retirement vehicle. Surrender charges and the pre-59½ penalty make it illiquid, so it belongs alongside more accessible accounts. The buyer this product suits has typically already funded a 401(k) and IRA, holds an adequate emergency fund, and wants a conservative complement offering tax-deferred growth with downside protection.
Before signing, expect the agent to gather detailed information about your finances, income, risk tolerance, and time horizon. Most states require that conversation as part of annuity suitability rules. An agent who skips it is worth walking away from.