Irregular income.
Any age.

The fixed-floor method applies here too. If you haven't read Budgeting: start with fixed expenses yet, start there, the same principles apply, the mechanics flex with your income.

Why monthly budgets fail with variable income

A standard personal finance system assumes a predictable paycheck. "Save $500 a month" works when your monthly income is $5,000. It breaks when your income is $12,000 one month and $2,000 the next.

What happens: in fat months, the $500 feels small, and lifestyle inflationinflationA general increase in prices over time, meaning each dollar buys less than it did before.Full definition absorbs the rest. In lean months, you skip savings entirely to cover rent. Annual savings ends up far below what the income justifies.

The fixed-floor method, adapted for variable income

Four steps. Each one answers a question the percentage-of-invoice crowd skips.

Retirement accounts for the self-employed

Self-employment unlocks some of the best retirement accounts in the tax code - accounts W-2 employees cannot use. Three main options:

For a single-owner business with no employees, the Solo 401(k) is almost always the winner. Fidelity and Schwab both offer free Solo 401(k)s with Roth options.

Quarterly estimated taxes

W-2 employees have taxes withheld every paycheck. Self-employed people have to handle it themselves - four times a year. Miss a payment and the IRS charges underpayment penalties even if you square up in April.

• Q1 (Jan-Mar income): pay by April 15.
• Q2 (Apr-May income): pay by June 15.
• Q3 (Jun-Aug income): pay by September 15.
• Q4 (Sep-Dec income): pay by January 15 of the following year.

Health insurance without an employer

Being self-employed means arranging your own coverage. Four realistic paths:

1. ACA marketplace. Income-based subsidies can make it affordable at low-to-middle incomes. Shop at healthcare.gov during open enrollment or qualifying life events.
2. HSAHealth Savings Account (HSA)A health savings account available only when eligibility requirements are met. Federal tax benefits depend on contribution limits and qualified medical expenses. Health coverage, other coverage and Medicare enrollment can affect eligibility; state tax treatment can differ.Full definition-eligible HDHPHigh-Deductible Health Plan (HDHP)A health-plan category with statutory deductible and out-of-pocket rules. HSA eligibility also depends on other conditions. Special 2026 rules cover qualifying bronze and catastrophic plans; verify the plan and your own eligibility rather than relying on its deductible alone.Full definition. High-deductible plans paired with a Health Savings Account give you the most tax-advantaged account in the U.S. code. Triple tax benefit.
3. COBRAConsolidated Omnibus Budget Reconciliation Act (COBRA)A federal law that lets you and your covered family keep an employer's group health plan after a job loss, cut in hours, divorce, or death, usually for 18 months and up to 36 in some cases. You can be charged up to the full premium plus a 2% fee. It generally applies to employers with 20 or more employees.Full definition bridge. If you just left a W-2 job, COBRA keeps your old plan for up to 18 months. Expensive but useful during a transition.
4. Spouse's employer plan. If available, often the cleanest and cheapest option.

Bitcoin DCA especially works here

Irregular income creates emotional investing mistakes. Big month? Felt rich, bought the top. Lean month? Panicked, sold the bottom. An automated DCA removes both failure modes.

Set your DCA against your minimum viable month, not your average. The point is to keep buying in the lean months, when you'd otherwise stop. If a fat month arrives, you can add a one-time top-up manually, after the tax reserve, after the buffer, after the higher priorities. The automated baseline is what carries you through the thin stretch. See DCA.