The number of paychecks in a year depends on your pay frequency: 52 for weekly, 26 for biweekly, 24 for semimonthly, and 12 for monthly. Biweekly and weekly schedules also produce occasional “extra” paycheck months — two months a year with three biweekly checks, or four to five weekly-pay months with five checks — which matters for budgeting and payroll planning.

This guide breaks down paychecks by schedule and what the extra-paycheck months mean. For the related question of how the payroll calendar is structured, see our guide on how many weeks are in a payroll year.

Paychecks by Pay Frequency

• Weekly (52 paychecks): paid every week. Smaller, more frequent checks; the most paychecks of any schedule.
• Biweekly (26 paychecks): paid every two weeks. The most common schedule for hourly and many salaried employees.
• Semimonthly (24 paychecks): paid twice a month, typically on set dates like the 15th and last day. Two fewer checks than biweekly, but each is slightly larger.
• Monthly (12 paychecks): paid once a month. The fewest checks, with the largest individual amount.

Biweekly vs. Semimonthly: The Key Difference

These two get confused often, but they’re not the same:

• Biweekly pays every 14 days, which adds up to 26 paychecks — and because 26 × 14 = 364 days, two months each year contain three paychecks instead of two.
• Semimonthly pays on two fixed dates each month, which always equals 24 paychecks and never has a “third check” month.

For salaried employees, biweekly checks are smaller (annual salary ÷ 26) while semimonthly checks are larger (annual salary ÷ 24), even though the yearly total is identical.

What the Extra-Paycheck Months Mean

On a biweekly schedule, two months a year have three paydays; on a weekly schedule, several months have five. For employees, those are great months for saving or paying down debt. For employers, they’re a budgeting and cash-flow consideration — payroll is higher in those months, and benefit deductions calculated per-paycheck may need adjusting. Our payroll tax guide for employers covers how withholding flows through each run.

If you want to see how payroll frequency, taxes, and compliance fit together, this baseline tool can serve as a starting reference: https://peopaygo.com/get-rate-exchange-blogs/u/step-1.

Which Pay Frequency Should Employers Choose?

• Weekly — common in construction and hourly-heavy industries; employees like frequent pay, but it’s the most processing.
• Biweekly — the most popular balance of frequency and simplicity.
• Semimonthly — clean for salaried teams and aligns neatly with monthly accounting.
• Monthly — least processing, but harder on employees’ cash flow and restricted in some states.

Note that some states regulate minimum pay frequency, so confirm your state’s rules before choosing.

Frequently Asked Questions

How many paychecks are in a year?

52 for weekly, 26 for biweekly, 24 for semimonthly, and 12 for monthly pay schedules.

Why are there three paychecks in some months?

On a biweekly schedule, paydays fall every 14 days, so two months each year contain three paydays instead of two. Weekly schedules have several five-paycheck months.

What’s the difference between biweekly and semimonthly?

Biweekly pays every two weeks (26 checks a year, with two three-check months); semimonthly pays on two fixed dates each month (always 24 checks, no extra-check months).

Are biweekly and semimonthly paychecks the same size?

No. For the same salary, biweekly checks are smaller (divided by 26) and semimonthly checks are larger (divided by 24), but the annual total is the same.

The Bottom Line

A year has 52 weekly, 26 biweekly, 24 semimonthly, or 12 monthly paychecks. The main wrinkle is biweekly’s two three-paycheck months (and weekly’s five-check months), which affect budgeting and payroll planning. Pick the frequency that fits your workforce and accounting — and check your state’s minimum pay-frequency rules first.

If you want to see how bundling payroll, taxes, and compliance through a single integrated provider keeps every pay run accurate, this baseline tool can serve as a starting reference: https://peopaygo.com/get-rate-exchange-blogs/u/step-1.

Setting up payroll? Choose a pay frequency that fits your team and cash flow, and confirm your state’s minimum pay-frequency requirements.

This article is for informational purposes only and does not constitute legal, tax, or payroll advice. Pay-frequency rules vary by state and change. Consult a qualified payroll or accounting professional for guidance specific to your business.

WOS in insurance stands for Waiver of Subrogation — a contract provision in which your insurer gives up its right to recover money from a third party (usually a client) after paying a claim. With a waiver in place, your insurance company cannot later pursue that party for reimbursement, even if they were at fault. It is commonly required in construction, vendor, and lease contracts.

If you’ve seen “WOS” on a certificate of insurance and weren’t sure what it meant, you’re not alone. The acronym shows up constantly in contracts, leases, and vendor agreements, and misunderstanding it can cost you a coverage gap or a stalled contract.

This guide explains what WOS means in plain terms, how subrogation works, why clients request a waiver, and what it means for your premium. For the full deep-dive, we link to our complete guides throughout — but the goal here is a clear, fast answer to the question “what is WOS in insurance?”

What Does WOS Stand For?

WOS is shorthand for Waiver of Subrogation. To understand the waiver, you first need to understand subrogation.

• Subrogation — The right of an insurer to step into your shoes and recover what it paid on a claim from the party that caused the loss.
• Waiver of subrogation — A provision in which your insurer agrees in advance not to pursue that recovery against a specific party, usually a client or business partner named in a contract.

In short: with a WOS in place, your insurance company can’t later sue the other party to get its money back, even if that party was at fault.

A Simple Example of How WOS Works

Imagine a contractor working at a client’s facility. An employee is injured, and the contractor’s workers comp insurer pays the claim. Normally, that insurer could investigate whether the client’s negligence caused the injury and try to recover its payout from the client — that’s subrogation.

If the contract included a waiver of subrogation, the insurer agrees up front not to pursue the client. The client is protected from that recovery action, which is exactly why so many clients require a WOS before they’ll sign.

For a more detailed walkthrough of the mechanics and real-world scenarios, see our complete guide on what waiver of subrogation means and our explainer on understanding waivers of subrogation and why they matter.

Why Clients Request a Waiver of Subrogation

A WOS shifts risk away from the client and onto your insurer. Clients ask for it to protect themselves from being pursued for losses connected to your work.

• It prevents your insurer from coming after them for a paid claim
• It reduces their litigation exposure on the project
• It’s a standard requirement in many construction, vendor, and commercial lease contracts
• It often appears alongside an “additional insured” requirement on the same certificate

If a contract requires a WOS and you can’t provide one, you may lose the job — which is why understanding the request matters as much as fulfilling it.

WOS vs. COI: They’re Not the Same Thing

People often confuse a waiver of subrogation with a certificate of insurance (COI). They serve different purposes.

• COI — A document proving you carry insurance, summarizing your coverage and limits.
• WOS — A specific endorsement or provision waiving your insurer’s recovery rights, often referenced on the COI.

The waiver is usually added to your policy as an endorsement and then noted on the certificate. We break the distinction down in detail in our guide comparing a certificate of insurance (COI) vs. waiver of subrogation (WOS), and explain the related difference between a workers compensation proof-of-insurance certificate and a certificate of insurance.

Does a Waiver of Subrogation Cost Extra?

Often, yes. Because a WOS removes your insurer’s ability to recover losses, carriers frequently charge an additional premium for the endorsement — commonly a small percentage of the policy premium. The exact cost depends on the policy type, the carrier, and whether the waiver is blanket (covering all qualifying contracts) or scheduled (covering specific named parties).

• Blanket waiver — Applies automatically to anyone you’re contractually required to waive against; convenient but usually pricier.
• Scheduled waiver — Names specific parties; narrower and sometimes cheaper.

How to Provide a WOS When a Contract Requires One

• Read the contract to confirm whether a waiver is required and for which policy (workers comp, general liability, or both)
• Contact your broker or carrier to add the endorsement
• Confirm whether you need a blanket or scheduled waiver
• Request an updated certificate of insurance that references the WOS
• Send the COI with the waiver noted to the requesting party

If you also need to produce the certificate quickly, our step-by-step on how to get a certificate of insurance in 5 easy steps covers the process.

If you want to evaluate how your workers comp and liability coverage, endorsements, and certificates fit together across your business, this baseline tool can serve as a starting reference: https://peopaygo.com/get-rate-exchange-blogs/u/step-1.

Frequently Asked Questions

What does WOS mean in insurance?

WOS stands for Waiver of Subrogation. It’s a provision in which your insurer agrees not to seek reimbursement from a specific party — usually a client — after paying a claim related to your work.

Is a waiver of subrogation the same as a certificate of insurance?

No. A certificate of insurance proves you carry coverage. A waiver of subrogation is a separate endorsement that waives your insurer’s recovery rights and is often referenced on the certificate.

Does a WOS cost money?

Usually. Carriers often charge an additional premium for the endorsement because it limits their ability to recover losses. The cost varies by policy type, carrier, and whether the waiver is blanket or scheduled.

Who needs a waiver of subrogation?

Any business whose clients or contracts require one — most commonly in construction, vendor agreements, and commercial leases. If a contract requires a WOS and you can’t provide it, you may be unable to take the job.

The Bottom Line

WOS in insurance simply means a waiver of subrogation: your insurer giving up its right to chase a third party for a paid claim. It’s a routine contract requirement, it often carries a small added premium, and it lives as an endorsement that gets noted on your certificate of insurance. Know whether your contracts require one, add it through your broker, and confirm your COI reflects it.

If you want to see how bundling workers compensation and business insurance with payroll and HR through a single integrated provider can simplify endorsements and certificate management, this baseline tool can serve as a starting reference: https://peopaygo.com/get-rate-exchange-blogs/u/step-1.

Not sure whether your contracts require a waiver of subrogation? Review your active agreements and confirm with your broker whether a blanket or scheduled WOS endorsement is the right fit for your business.

This article is for informational purposes only and does not constitute legal, tax, or insurance advice. Subrogation rules, endorsement costs, and contract requirements vary by state, carrier, and policy and change frequently. Consult a qualified insurance broker or attorney for guidance specific to your business.