Utility Deposit Bond Calculator
Most utilities size a commercial security deposit at about two times your average monthly bill — the same multiple Florida and Texas both write directly into their deposit rules. Enter your bill below and get an instant estimate of that deposit and the annual bond premium that can replace it, without tying up the cash.
Utility Deposit Bond Calculator
Type your average monthly bill — the estimate updates as you type.
From a recent bill, or the average of your last 12 months if usage varies by season.
Utility deposit bonds are payment-guarantee bonds — carriers price mainly off personal or business credit, similar to a financial guarantee bond.
Estimated deposit the utility will ask for
$3,000
≈ 2 × your average monthly bill
Estimated annual bond premium
$110
Range: $100–$120/yr
Capital that stays in your business this year
$2,890
Deposit avoided ($3,000) minus the bond premium you pay instead
This is a planning estimate, not a quote. Your bond amount must match the dollar figure on your utility's written deposit demand — see the methodology below.
Where the 2x-average-bill rule actually comes from
Utility deposits usually aren't set by a statute at all — the utility's own tariff or credit policy decides the number. Two states are the exception, and both land on the same multiple through different math:
Official Florida Requirements
"For an existing account, the total deposit may not exceed 2 months of average actual charges, calculated by adding the monthly charges from the 12-month period immediately before the date any change in the deposit amount is sought, dividing this total by 12, and multiplying the result by 2. For a new account, the total deposit may not exceed 2 months of projected charges."The Florida Senate — 2024 Florida Statutes • Fla. Stat. §366.05(1)(c); implemented by Fla. Admin. Code R. 25-6.097
Official Texas Requirements
"The total of all deposits shall not exceed an amount equivalent to one-sixth of the estimated annual billing."Public Utility Commission of Texas • 16 Tex. Admin. Code §25.24(f)
One-sixth of a year is two months — the Texas rule and the Florida rule are the identical multiple, expressed as an annual fraction instead of a monthly one. That convergence is why the 2x figure shows up as an industry norm even in states with no statute at all: it is the amount that covers roughly two billing cycles of exposure if an account defaults, which is the exact risk the deposit exists to cover. See the utility deposit bonds hub for how acceptance and claim mechanics work once the amount is set, or the Florida utility deposit bond guide for how FPL, Duke Energy Florida, TECO, and JEA each apply this cap in practice.
What bonding actually saves versus paying cash
Take a business averaging a $3,000 monthly bill — a $6,000 deposit under the 2x rule. Here is where that $6,000 goes under each option over a typical 2-year deposit-review cycle:
Pay the $6,000 deposit in cash
Post a $6,000 bond instead
Illustrative example at a $3,000/mo average bill. Premium range reflects sitewide financial guarantee bond pricing (2%–7% of the bond amount); use the calculator above for a figure based on your own bill and credit profile. Deposit-refund interest varies by utility and state — Florida's 23-month nonresidential rate is shown; many states pay no interest at all.
Already know your bill and credit profile? Scroll up and run the numbers.
Skip to quote formThe two states that put the 2x rule into law
Florida and Texas regulate deposits differently — one Public Service Commission rule tied to a single statute, one Public Utility Commission substantive rule spanning both bundled utilities and deregulated retail providers — but both land on the same multiple:
Florida vs. Texas — the statutes behind the 2x-average-bill calculator
Governing rule, deposit formula, and example providers by regulatory framework
| Framework | Governing rule | Deposit formula | Example utilities / providers |
|---|---|---|---|
| Florida — FPSC-regulated | Fla. Stat. §366.05(1)(c); Fla. Admin. Code R. 25-6.097 | 2 months of average actual (existing accounts) or projected (new accounts) charges | FPL, Duke Energy Florida, TECO |
| Florida — municipal utility | JEA board-approved deposit policy (outside FPSC jurisdiction) | ≈2x monthly billed consumption average (usage history) or a flat minimum (none) | JEA (Jacksonville) |
| Texas — bundled / non-competitive areas | 16 Tex. Admin. Code § 25.24(f) | 1/6 of estimated annual billing (= 2 months) | El Paso Electric, Southwestern Public Service (Xcel Energy Texas), Entergy Texas |
| Texas — ERCOT deregulated areas | PUC-approved Terms of Service (mirrors §25.24's statewide cap) | 1/6 of estimated annual billing (= 2 months), per each provider’s filed terms | Retail electric providers serving ERCOT territory |
Sources: Fla. Stat. §366.05(1)(c) (flsenate.gov); Fla. Admin. Code R. 25-6.097 (flrules.org); 16 Tex. Admin. Code §25.24(f) (puc.texas.gov). JEA figure per JEA's published commercial deposit policy, board-set and outside FPSC jurisdiction.
Outside Florida and Texas, most utilities follow a similar ~2x practice without a statute requiring it — always confirm the exact figure and methodology with your utility's credit department.
Who this calculator is actually built for
Both statutes cited above draw a real line between residential and non-residential accounts — and that line determines whether bonding is even the relevant option:
Business / commercial accounts
This is where the calculator earns its keep. Texas gives residential applicants a letter-of-guarantee alternative to a cash deposit under 16 Tex. Admin. Code §25.24(c) — non-residential applicants get no such option; if credit isn't satisfactorily established, a deposit is required, full stop. That makes a bond the practical substitute for cash on commercial accounts specifically. Restaurants, manufacturers, cold storage, and multi-location operators see the largest deposit demands and the biggest working-capital benefit from bonding.
16 Tex. Admin. Code §25.24(b)–(c)
Residential accounts
Residential deposits are typically small enough that bonding rarely makes economic sense, and both states build in cash-saving alternatives residential customers can use instead. Texas lets a residential applicant substitute a written letter of guarantee. Florida requires a residential guarantor to already be a utility customer with a satisfactory payment record, and refunds residential deposits automatically after 23 months of continuous, satisfactory service — a non-residential deposit only gets that treatment if the utility chooses to refund it, and can instead just keep paying interest indefinitely.
Fla. Admin. Code R. 25-6.097(2)(a), (3), (5)(a)
Questions about the calculator and the 2x rule
How accurate is the 2x-average-monthly-bill estimate?
It is the convention two of the largest deposit-setting frameworks in the country actually use, not a rule of thumb we invented. Florida caps deposits at 2 months of charges under Fla. Stat. §366.05(1)(c), and Texas caps them at 1/6 of estimated annual billing under 16 Tex. Admin. Code §25.24(f) — 12 months ÷ 6 is exactly 2 months, the same multiple stated a different way. Most utilities outside those two states follow a similar policy even without a statute forcing it, because the deposit is meant to cover roughly two billing cycles of exposure if you default. Your utility’s written demand is still the number that governs — this calculator estimates it before that letter arrives.
Why does the calculator ask for my credit profile, not just the bill amount?
Because a utility deposit bond is a payment-guarantee bond, not a fixed-rate license bond — the carrier is underwriting the risk that you default and it has to pay the utility, and that risk correlates with credit the same way it does on a financial guarantee bond. A $6,000 bond for an owner with 750+ credit prices very differently from the same $6,000 bond for an owner with a sub-620 score. The calculator uses four bands (2%–7% of the bond amount, in line with financial guarantee bond pricing sitewide) so the premium estimate reflects your actual underwriting profile, not a single blended average.
TECO bases new Florida deposits on square footage and business type, not a bill average. Does the calculator still work for that?
Use it as a starting estimate, then expect TECO's actual figure to differ. TECO's new-account deposit method estimates your projected charges from square footage and business type rather than averaging a billing history that does not exist yet for a brand-new account — but Fla. Stat. §366.05(1)(c) still caps that projected-charge estimate at 2 months, the same ceiling this calculator uses. Once TECO has 12 months of your actual usage, the deposit recalculates using real data and should land close to what this calculator shows for your true average bill.
Is the bond premium a one-time cost or does it repeat every year?
It repeats. A utility deposit bond is renewed annually for as long as the utility requires the deposit, so the premium this calculator shows is an annual figure you pay each year the bond stays in force — not a one-time fee. That is the trade you are evaluating: a small recurring premium versus a lump sum of cash sitting with the utility, in some cases for 23 months or longer before a refund review even happens.
Does this work for a gas or water utility deposit, or only electric?
The 2x-average-bill math applies the same way regardless of which utility sent the demand — electric, gas, water, or steam. The two statutes cited on this page (Florida and Texas) happen to be written for electric service specifically, but the deposit logic (and most other states’ informal practice) is consistent across utility types. What changes by utility type is acceptance: not every gas or water utility takes a bond in place of cash the way FPL, Duke Energy Florida, or Georgia Power do. Confirm bond acceptance with the specific utility’s credit department before applying.
My utility already sent a demand for more than 2x my average bill. What now?
That happens most often on new accounts with no billing history (the utility is estimating, sometimes conservatively) or on accounts with a recent late-payment or disconnection history, which can push the deposit above the routine multiple. Bond to whatever figure is on the actual demand letter — the bond amount must match that number exactly, not the calculator’s estimate. If the figure looks high relative to comparable accounts, ask the utility’s credit department how they calculated it; in Florida and Texas, they are required to apply a documented methodology, not an arbitrary number.
All content is researched from official state and federal sources (.gov) and verified before publication. BuySuretyBonds.com works with Treasury-certified, A-minimum rated surety carriers serving all 50 states.
This calculator provides a planning estimate only, not a quote or a guarantee of your actual deposit or premium. Deposit methodology, acceptance of bonds in place of cash, and refund timelines are set by each utility and, where applicable, by state law — confirm the current requirement with your utility's credit department before applying, and request a formal quote for your exact figures.
Ready to turn that estimate into a quote?
Send us your utility's written deposit demand (or the estimate above if you don't have it yet) and we'll match it with a bond on that utility's own form — most utility deposit bonds issue electronically, often the same day.