The different fields of law exist because no single lawyer could master every statute, regulation, and court decision that touches modern life. Each field covers a distinct type of problem: crimes, injuries, marriages, jobs, businesses, property, inheritance, debt, taxes, immigration, and the rules governing government itself. Knowing which field your situation falls into is the first step toward finding the right attorney and understanding what the process will look like.
What follows is a plain tour of the major fields, what each one handles, and the rules a non-lawyer is most likely to run into.
Criminal Law
Criminal law covers conduct the government treats as an offense against society rather than a private wrong between two people. The government brings the case, and the consequences include fines, probation, or imprisonment. Federal law sorts offenses by the maximum prison sentence. Misdemeanors carry up to one year, usually served in a local jail. Felonies start where misdemeanors end and range from more than one year up to life, depending on the class of offense.1Office of the Law Revision Counsel. 18 U.S. Code 3559 – Sentencing Classification of Offenses
Fines scale with severity. Under federal law, a Class A misdemeanor can carry a fine up to $100,000, lower-level misdemeanors max out at $5,000, and felony fines can reach $250,000 for an individual.2Office of the Law Revision Counsel. 18 U.S. Code 3571 – Sentence of Fine States set their own classification systems and fine ceilings, but the one-year dividing line between misdemeanors and felonies is nearly universal.
The prosecution must prove every element of the crime beyond a reasonable doubt. That standard exists because a conviction can take away someone’s freedom, so the system demands near-certainty before allowing it. Defense attorneys probe weaknesses in the government’s evidence, challenge how it was collected, and hold prosecutors to every procedural requirement.
Rights of the Accused
Anyone taken into custody and questioned must first be told they have the right to remain silent, that anything they say can be used against them, that they have the right to an attorney, and that an attorney will be appointed if they cannot afford one. These warnings come from the Supreme Court’s 1966 decision in Miranda v. Arizona, and statements obtained without them are generally inadmissible at trial.3United States Courts. Facts and Case Summary – Miranda v. Arizona The Constitution also guarantees the right to a speedy and public trial, the right to confront witnesses, and protection against being tried twice for the same offense.
Civil Litigation and Torts
When one person harms another and the dispute isn’t criminal, the injured party can file a civil lawsuit asking for money to compensate for what they lost. The goal is to restore the person to the position they were in before the harm, not to punish the wrongdoer. Tort law provides the framework for most of these claims.
Negligence is the most common tort. To win, a plaintiff must show the defendant owed a duty of care, breached that duty, and that the breach directly caused the plaintiff’s injuries. A driver who runs a red light and hits a pedestrian fits the pattern. Intentional torts like assault or defamation require a different showing: the plaintiff must prove the defendant acted deliberately. The burden of proof in civil cases is a preponderance of the evidence, meaning the plaintiff needs to show it is more likely than not that their version of events is correct. That is a lower bar than beyond a reasonable doubt.
Personal injury claims make up a large share of tort litigation. Damages typically cover medical bills, lost income, and compensation for pain and ongoing physical limitations. Before trial, both sides go through discovery: a formal process of exchanging documents, answering written questions, and taking depositions where witnesses give sworn testimony outside the courtroom. Most personal injury cases settle before reaching a jury.
Filing Deadlines
Every civil claim has a statute of limitations, a deadline after which you lose the right to sue. Personal injury deadlines vary by jurisdiction, commonly from one to six years. Missing the deadline almost always ends the case before it starts, regardless of how strong the evidence is. In some situations the clock doesn’t begin running until the injured person discovers the harm. Medical malpractice cases often involve this “discovery rule” because a patient may not realize a surgical instrument was left inside them until months later.
Family Law
Family law handles the legal side of domestic relationships: marriage, divorce, child custody, adoption, and protective orders. When a marriage ends, one or both spouses file a petition with the court, and the divorce process resolves how property gets divided, whether either spouse receives financial support, and how parenting responsibilities are shared.
Child custody decisions center on a standard known as the best interests of the child. Courts look at factors like each parent’s living situation, the child’s existing relationships, and each parent’s ability to provide stability. The result is a custody arrangement and a visitation schedule, sometimes called a parenting plan. Child support is calculated using formulas that account for both parents’ incomes, childcare costs, and health insurance expenses. Most states use an income-shares model that estimates what the parents would have spent on the child if the household had stayed together.
Adoption is another core area. Before a new legal parent-child bond can be created, existing parental rights must be terminated, either voluntarily or through a court proceeding. Domestic violence cases also fall within family law. Protective orders can require an abuser to stay away from the victim’s home, workplace, and school, and can restrict all forms of contact. These orders are often available the same day on a temporary basis, with a full hearing scheduled shortly after.
Prenuptial agreements let couples define financial expectations before getting married, addressing property division, spousal support, and debt responsibility if the marriage ends. Courts scrutinize them for fairness, and an agreement reached without both parties fully disclosing their financial picture is far more likely to be thrown out.
Employment and Labor Law
Employment law governs the relationship between employers and workers, covering hiring practices, workplace safety, and the terms of termination. Most employment in the United States operates under the at-will doctrine, meaning either side can end the relationship at any time, for almost any reason. The key word is “almost.”
Courts have carved out three major exceptions. The public-policy exception, recognized in roughly 43 states, prohibits firing someone for reasons that violate a clear public policy, like retaliating against a worker who filed a safety complaint or refused to break the law. The implied-contract exception applies when an employer’s handbook, policies, or verbal promises create an expectation of continued employment. A minority of states also recognize an implied duty of good faith, which bars terminations motivated by bad faith or malice.4Bureau of Labor Statistics. The Employment-at-Will Doctrine: Three Major Exceptions
Federal anti-discrimination law adds another layer. Title VII of the Civil Rights Act prohibits employers with 15 or more employees from discriminating based on race, color, religion, sex, or national origin.5U.S. Equal Employment Opportunity Commission. Title VII of the Civil Rights Act of 1964 Separate statutes extend protections to age, disability, and genetic information. Discrimination claims typically go through the Equal Employment Opportunity Commission before a lawsuit can be filed in court.
Wage and hour disputes form the other major branch. The Fair Labor Standards Act requires most employers to pay overtime at one-and-a-half times the regular rate for hours worked beyond 40 in a week. Salaried employees in executive, administrative, or professional roles can be exempt from overtime, but only if they earn at least $684 per week ($35,568 per year).6U.S. Department of Labor. Earnings Thresholds for the Executive, Administrative, and Professional Exemptions Some states set higher thresholds.
Corporate and Business Law
Business law provides the framework for creating, operating, and dissolving organizations. When someone starts a business, the first legal decision is the choice of entity: sole proprietorship, partnership, limited liability company, or corporation. Each structure carries different consequences for taxation, personal liability, and management authority. LLCs and corporations both shield their owners from personal responsibility for the company’s debts, but only if the owners follow formation requirements and keep business finances separate from personal ones.
Forming a corporation requires filing articles of incorporation with a state agency. The articles set out basic information like the company’s name, purpose, and share structure. Bylaws then provide the internal operating rules, covering how directors are elected, when shareholder meetings happen, and how major decisions get approved. LLC formation works similarly through an operating agreement that defines ownership percentages and decision-making procedures.
Contract drafting and review occupy much of a business lawyer’s time. Vendor agreements, employment contracts, non-compete clauses, and partnership terms all need to be clear enough to hold up in court if the relationship goes sideways. Mergers and acquisitions represent the most complex transactions in this field, requiring careful valuation of assets, regulatory approval, and integration of two organizations into one.
Intellectual property protection also falls under the business law umbrella. A trademark protects brand names and logos, a patent protects inventions, and a copyright protects original creative works. Each type of protection involves a different registration process and grants different rights.7United States Patent and Trademark Office. Trademark Process Getting these registrations in place early prevents costly disputes over ownership down the line.
Property and Real Estate Law
Property law governs ownership, use, and transfer of land and buildings. Residential transactions involve purchase agreements, inspections, title searches to confirm no outstanding claims exist against the property, and the recording of a deed with the local government to make the transfer official. Commercial deals add complexity through lease negotiations, environmental assessments, and financing arrangements that can involve multiple lenders.
Zoning regulations control how parcels of land can be used. A parcel zoned residential typically cannot house a retail business, and a commercially zoned lot may face restrictions on the type of commercial activity allowed. Property owners who want to use their land outside existing zoning must seek a variance or rezoning from the local government. Easements grant limited rights to use someone else’s property for a specific purpose, such as a utility company maintaining power lines across private land, or a neighbor crossing your property to reach a public road.
Landlord-tenant law defines rights and obligations on both sides of a rental arrangement. Lease agreements spell out rent, length of tenancy, maintenance responsibilities, and rules for termination. State law typically sets limits on security deposits, specifies how much notice a landlord must give before raising rent or ending a tenancy, and outlines the formal eviction process. Tenants who face illegal lockouts or uninhabitable conditions have legal remedies, though the specifics vary by jurisdiction.
Eminent Domain
The Fifth Amendment’s Takings Clause provides that private property cannot be taken for public use without just compensation.8Constitution Annotated. Overview of Takings Clause When the government needs land for a highway, public building, or similar project, it can force the sale through eminent domain proceedings. The owner is entitled to fair market value, determined through appraisal, though sentimental attachment to the property doesn’t factor into the calculation. Courts have interpreted “public use” broadly enough to include economic development projects.
Seller and Landlord Disclosures
Federal law requires sellers and landlords of most housing built before 1978 to disclose any known lead-based paint hazards before completing a sale or lease. Sellers must also give buyers a 10-day window to conduct a paint inspection. The rule applies to private housing, public housing, and federally assisted housing, with narrow exceptions for properties confirmed lead-free by a certified inspector.9U.S. Environmental Protection Agency. Lead-Based Paint Disclosure Rule Most states mandate additional disclosures about property conditions like structural problems, water damage, or pest infestations.
Estate Planning and Probate
Estate planning arranges for the management and distribution of your property during your lifetime and after death. The most basic tool is a last will and testament, which names who receives your assets and designates an executor to manage the process. A will is also the only way to name a guardian for minor children. Without a will, state law determines who inherits your property through a default order that may not match your wishes.
Revocable living trusts offer an alternative. Assets placed in a trust during your lifetime pass directly to your beneficiaries without going through probate, the court-supervised process for settling an estate. Probate can take months or years, involves court filing fees, and creates a public record of your assets and beneficiaries. A trust avoids all of that. It also allows a successor trustee to step in and manage your finances if you become incapacitated, something a will cannot do because it only takes effect after death.
Other essential estate planning documents include a durable power of attorney, which authorizes someone to handle your financial affairs if you are unable to, and an advance healthcare directive, which designates someone to make medical decisions on your behalf and records your wishes about life-sustaining treatment. Without these documents, your family may need to petition a court for guardianship.
Estates above a certain value face the federal estate tax. For 2026, the basic exclusion amount is $15 million per individual, meaning estates below that threshold owe nothing in federal estate tax. The top rate on amounts above the exclusion is 40 percent.10Internal Revenue Service. What’s New – Estate and Gift Tax Some states impose their own estate or inheritance taxes at lower thresholds.
Bankruptcy Law
Bankruptcy provides a legal mechanism for people and businesses that cannot pay their debts. Filing triggers an automatic stay, which immediately halts most collection actions, lawsuits, wage garnishments, and foreclosure proceedings against the debtor.11Office of the Law Revision Counsel. 11 U.S. Code 362 – Automatic Stay That breathing room is often the most immediate relief a filer receives.
The two most common paths for individuals are Chapter 7 and Chapter 13. Chapter 7 is a liquidation process: a court-appointed trustee sells the debtor’s nonexempt assets and distributes the proceeds to creditors, and most remaining unsecured debts are discharged. Certain property is exempt from liquidation, though exemption amounts vary by state. Chapter 13 works differently. Instead of liquidating assets, the debtor proposes a repayment plan lasting three to five years, paying creditors from future income. Chapter 13 is particularly valuable for homeowners facing foreclosure, because it allows them to catch up on missed mortgage payments over time while keeping the property.12United States Courts. Chapter 13 – Bankruptcy Basics
Eligibility depends on the chapter. Chapter 7 filers must pass a means test comparing their income to the state median. Filers whose income is too high are generally pushed toward Chapter 13. Chapter 13 has its own limits: unsecured debts cannot exceed $526,700 and secured debts cannot exceed $1,580,125.13Office of the Law Revision Counsel. 11 U.S. Code 109 – Who May Be a Debtor Both chapters require credit counseling from an approved agency before filing. Not all debts can be discharged. Student loans, most tax debts, child support, and alimony generally survive the process.
Tax Law
Tax law governs how governments collect revenue from individuals and businesses. At the federal level, the Internal Revenue Code establishes a progressive income tax system with seven brackets for 2026, with rates ranging from 10 percent on the lowest tier of income to 37 percent on income above roughly $641,000 for single filers. Tax attorneys and accountants help clients minimize their tax burden through legitimate planning, ensure compliance with filing obligations, and represent clients in disputes with the IRS.
The distinction between tax avoidance and tax evasion matters enormously. Tax avoidance uses legal deductions, credits, and entity structures to reduce what you owe. Tax evasion deliberately hides income or falsifies records, and it is a federal crime. Much of tax practice sits in the gray area between the two, interpreting ambiguous provisions in the way most favorable to the client.
When the IRS believes you owe more than you reported, the dispute follows a structured path. The agency typically begins with a notice proposing adjustments. If the taxpayer disagrees and cannot resolve the issue informally, the IRS issues a Notice of Deficiency, sometimes called a 90-day letter, which gives the taxpayer 90 days to petition the U.S. Tax Court before the IRS can assess the additional tax. Missing that deadline means the IRS collects first and the taxpayer’s only recourse is to pay the full amount and then sue for a refund.14Internal Revenue Service. Understanding Your CP3219N Notice For disputes involving $50,000 or less per tax year, the Tax Court offers simplified small-case procedures.
Immigration Law
Immigration law controls who can enter, stay in, and become a citizen of the United States. The Immigration and Nationality Act is the primary federal statute, and it divides foreign nationals into two broad categories: immigrants, who intend to live in the U.S. permanently, and nonimmigrants, who enter temporarily for purposes like work, education, or tourism. Each category contains dozens of specific visa classifications with their own eligibility requirements and conditions of stay.
Removal proceedings, often called deportation, are the enforcement side. The government can initiate removal against a noncitizen who entered without authorization, overstayed a visa, or committed certain crimes. These proceedings take place before immigration judges in a system separate from the regular court system. Immigration attorneys in this space work on bond hearings, challenge the government’s grounds for removal, and pursue forms of relief like cancellation of removal or voluntary departure.
Asylum provides protection for people who face persecution in their home country. An applicant must demonstrate a well-founded fear of persecution based on race, religion, nationality, membership in a particular social group, or political opinion. Applications generally must be filed within one year of arriving in the United States, though exceptions exist for changed or extraordinary circumstances.15Office of the Law Revision Counsel. 8 U.S. Code 1158 – Asylum
Naturalization is the process by which a lawful permanent resident becomes a U.S. citizen. The standard path requires at least five years of continuous residence after obtaining a green card, physical presence in the country for at least half of that period, demonstrated good moral character, and the ability to pass English language and civics tests.16Office of the Law Revision Counsel. 8 U.S. Code 1427 – Requirements of Naturalization Spouses of U.S. citizens can apply after three years instead of five.
Administrative and Constitutional Law
Administrative law governs how federal agencies create and enforce regulations. The Administrative Procedure Act sets the ground rules: before an agency can adopt a new regulation, it must publish a notice of the proposed rule in the Federal Register, allow the public to submit comments, and explain the basis and purpose of the final rule it adopts.17Office of the Law Revision Counsel. 5 U.S. Code 553 – Rule Making This notice-and-comment process is meant to prevent agencies from acting arbitrarily.
When an agency brings an enforcement action against an individual or business, the case is often heard by an administrative law judge rather than a regular federal judge. ALJs preside over formal hearings, take testimony, review evidence, and issue decisions with written findings of fact and legal conclusions.18Administrative Conference of the United States. Administrative Law Judge Basics Federal agencies employ hundreds of ALJs who handle everything from Social Security disability appeals to environmental enforcement cases. If you disagree with an agency’s final decision, you can challenge it in federal court, though courts generally defer to the agency’s interpretation of the statutes it administers.
Constitutional law sits above all of these fields. It addresses the structure of government, the division of power between the federal government and the states, and the individual rights protected by the Bill of Rights and subsequent amendments. Constitutional lawyers handle cases involving free speech, equal protection, due process, search and seizure, and the boundaries of government authority. A ruling on the scope of the Commerce Clause can reshape business regulation nationwide, and a decision on the Fourth Amendment changes how criminal investigations are conducted in every jurisdiction.
Finding the Right Lawyer
Most real-world problems fit cleanly into one of these fields, and matching the problem to the field is usually the hardest part of hiring a lawyer. A workplace firing is employment law. A car crash is torts. A rental dispute is property law. Some situations cross fields: a divorce involving a family business touches family, business, and tax law at once, and a criminal charge against a noncitizen pulls in immigration consequences. When a case straddles fields, ask any attorney you consult whether they regularly handle the other side of your problem, or whether they work with someone who does.