1099 vs W-2: What Actually Decides It, and What It Costs Each Side

A W-2 employee works under the direction of the business that pays them; a 1099 contractor is in business for themselves and controls how the work gets done. That difference in control is what decides the classification — not the form that gets filed at year end, and not what the contract calls the arrangement.

Two different people search this. If you run a business and are deciding how to classify someone, the sections on the control test and on misclassification risk are the ones you need. If you have been offered 1099 work, or you are already on a 1099 and trying to work out whether it is a good deal, skip to the sections on self-employment tax and on what else changes. Both audiences should read the control test, because it is the part almost everyone gets wrong.

The short answer

The last two rows explain why this comes up at all. Contractors are cheaper for the payer, and the cost that disappears from the business's side mostly reappears on the worker's.

What actually decides whether someone is a contractor?

The IRS looks at the whole relationship and groups the evidence into three categories. No single item is decisive — the question is where the weight of the facts lands.

Behavioral control. Does the business direct or control how the work is done? Instructions about when and where to work, what sequence to follow, what tools to use, and who else can be hired all point toward employment. So does training: a business that trains someone in its own methods is generally treating them as an employee. A contractor is typically told what the finished result should be and left to decide how to get there.

Financial control. Does the worker have a real stake in the business side of the work? Contractors typically have unreimbursed expenses, an investment in their own equipment, the ability to offer services to other clients, and a genuine possibility of profit or loss. Being paid a flat fee for a project leans contractor; being paid a regular hourly or weekly wage regardless of outcome leans employee.

Relationship of the parties. How do both sides treat the arrangement? Benefits like health insurance, paid leave, or a retirement plan are strong employee signals. So is an open-ended engagement rather than a defined project, and work that is a core part of what the business does rather than something peripheral to it.

The common thread is independence. Someone who sets their own hours, uses their own tools, serves other clients, and can profit or lose on the engagement looks like a business. Someone integrated into your operations, working your hours, under your supervision, indefinitely, does not — whatever the paperwork says.

Why a 1099 rate is not comparable to a W-2 salary

This is the section for workers, and it is the single most expensive misunderstanding in the whole topic.

On a W-2, Social Security and Medicare taxes are split between you and your employer. You see your share come out of each paycheck; you never see the employer's share, but it is being paid on your behalf. As a 1099 contractor, there is no employer — so you pay both halves yourself, as self-employment tax.

The combined rate is currently around 15.3%, made up of a Social Security portion that applies up to an annual wage base and a Medicare portion with no cap. The rate and the wage base are set by statute and change, and an additional Medicare surcharge applies above certain income levels, so confirm the current figures before you rely on them. Two structural details soften the hit: the tax is calculated on a slightly reduced share of your net earnings rather than the full amount, and roughly half of what you pay is deductible against your income tax.

Here is the shape of it on $70,000, using approximate current rates:

That gap is before benefits. If the W-2 job also came with health insurance, a retirement match, and paid time off, the real gap is considerably wider — and those are the numbers you have to put a price on yourself, because nobody will quote them to you.

The practical version: a $70,000 contract is not a $70,000 job. A commonly used rule of thumb is that a contractor needs meaningfully more than the equivalent salary to break even, often in the region of 25–30% more once payroll taxes and self-funded benefits are counted. Treat that as a starting point for your own arithmetic, not a formula — the right number depends entirely on what benefits you are giving up and what you can deduct.

What else changes when you go 1099?

Nobody withholds anything. No income tax comes out of what you are paid, and the tax authorities generally expect payment through the year rather than in one lump at filing time. Most self-employed people need to make quarterly estimated payments, and underpaying can trigger a penalty even if you settle up in full later. Our guide to estimated tax payments covers the schedule and how to size each payment.

You buy your own safety net. Health insurance, disability cover, paid leave, and any retirement saving come out of your rate. You are also generally outside unemployment insurance and workers' compensation.

But you can deduct business expenses. Equipment, software, professional insurance, a qualifying home office, mileage, and training are deductible against business income in a way that is largely unavailable to employees. For some contractors this recovers a real share of the tax difference.

And retirement limits are often higher. Self-employed retirement plans can allow substantially larger annual contributions than a typical workplace plan, because you are contributing as both employer and employee. Which plan suits you depends on your income and whether you have employees of your own — worth one conversation with an accountant before you pick one.

Bookkeeping becomes your job. Invoices, expense records, and a separate business account stop being optional — and the deductions above are only worth what you can substantiate.

What does misclassification cost a business?

This is the section for employers, and the exposure is larger than most owners expect.

If a worker treated as a contractor is later determined to be an employee, the business can be liable for the payroll taxes that should have been withheld and paid, plus interest and penalties. Depending on the facts, benefits the worker would have been entitled to and wage-and-hour obligations such as overtime can come into it too.

Then there is the state layer, and it is the part people miss. States run their own tests for their own purposes — unemployment insurance, workers' compensation, state wage law — and some states apply a stricter standard than the federal one. A worker can be a legitimate contractor for federal tax purposes and an employee under a particular state's law at the same time. If you engage contractors in more than one state, that is not a hypothetical.

Determinations rarely start with an audit. They usually start with something mundane: a contractor files for unemployment after an engagement ends, or gets hurt on the job, or files a form asking for their status to be reviewed. Any of those can put the question in front of an agency.

What about the genuinely ambiguous cases?

Plenty of real arrangements sit in the middle. A long-running part-time consultant. A specialist who works mostly for you but keeps two other clients. A seasonal worker who uses your equipment but sets their own schedule. These are not obviously either thing, and pretending otherwise is how businesses get into trouble.

• A written agreement helps, but it does not decide it. A clear contract documenting the parties' intent is genuine evidence, and you should have one. It is one factor among many, and it loses to the facts of how the work is actually performed. If the contract says "independent contractor" and you supervise the person daily, the day-to-day supervision is what counts.
• Make the facts match the label. If you want a contractor relationship, let the contractor control the how: define deliverables rather than hours, avoid requiring set working times where the work does not demand it, let them use their own tools, and do not extend employee benefits.
• Be consistent. Treating two people doing substantially the same work differently is difficult to defend.
• Keep the evidence. Invoices, the contractor's own business registration and insurance, evidence they serve other clients, and a scoped agreement are what you would actually produce if asked.
• You can ask for a determination. Either the business or the worker can file Form SS-8 to have the IRS review the relationship and rule on it. It is not fast, and the answer binds you, so it is best used for a pattern you plan to repeat rather than a single edge case. Talk it through with an accountant before filing.

What to do next

If you are the business: write down, honestly, who controls the how for each contractor you use. Where the answer is "we do", either change how the work is managed or reclassify the person. Then check the rules in every state where your workers actually sit, not just where you are incorporated. Payroll is the natural place to get this reviewed — 2,894 of the 13,986 firms in our directory advertise payroll services, and you can start with small business accountants near you.

If you are the worker: before accepting a 1099 rate, price it against the W-2 alternative including benefits, set aside money for taxes from the first payment rather than the first quarter, and read up on estimated tax payments. If your status feels wrong — you are supervised like staff but paid like a vendor — it is worth a professional opinion. A tax accountant near you can review the arrangement before it becomes a filing problem.

Either way, the cheapest time to fix a classification is before a return is filed on it.

Method and caveat

Directory figures come from the AccountingNearYou dataset as of 13 August 2026: 13,986 US accounting firms profiled from their own public websites, of which 6,395 advertise tax preparation and 2,894 advertise payroll services. A firm is counted only where the service appears on the pages we crawled, so these are counts of what firms advertise, not of everything they do.

This guide is general information about how worker classification works in the United States. It is not advice about a specific worker, and classification turns entirely on the facts of an individual relationship. Tax rates, wage bases, and state tests change — confirm current figures with the IRS or your state agency, and get a professional opinion before classifying or reclassifying anyone.