Personal Finance Glossary

The practice of assigning every dollar of income to a category — spending, savings, or debt — until your unallocated total hits exactly zero. Not "what's left over after spending," but what's earmarked before spending. Forces a deliberate decision on every dollar.

BudgetLabs is built around this. The Dashboard summary shows your remaining gap, with a floating widget that surfaces an Assign button when in surplus and a Reduce Plan button when in deficit so you always have a one-tap path back to zero.

Related reading: Zero-Based Budgeting: A Practical Guide (pillar), The Dashboard, Quickstart.

A savings category that accumulates monthly toward a known one-time future expense — car insurance, holiday gifts, summer camp tuition, the once-a-decade roof replacement. Spreads the cost across the months leading up to it instead of letting it crater your budget when the bill lands.

The math is simple: divide the expected cost by the months until it hits, save that amount each month. By the time the bill arrives, the cash is sitting in the sinking fund waiting for it.

Related reading: Sinking Funds 101 (blog), amortization.

Spreading a one-time expense across the months it actually affects your budget. A $1,200 annual car insurance bill is a $100/month expense in the way it hits your cash flow, not a $1,200 January expense. Amortization is the budgeting equivalent of accrual accounting.

BudgetLabs has built-in transaction amortization: log a single bank charge, tell it to spread across N months, and the dashboard sees only the current month's share while the bank statement still shows one transaction.

Related reading: Transactions, sinking fund.

The original technique: cash for each spending category in physical envelopes; when an envelope is empty, you're done spending in that category for the month. Modern apps simulate this with category-level limits and "available" balances.

Conceptually adjacent to zero-based budgeting, but more rigid. Zero-based focuses on assignment; envelope focuses on enforcement. BudgetLabs takes the zero-based stance — it shows you when you're over but doesn't lock spending; you're an adult.

Moving unspent (or overspent) money from one month's category into the next. If you planned $400 for groceries and only spent $350, rollover lets the leftover $50 carry into the next month rather than evaporate.

BudgetLabs takes a flexible position: rather than automatic rollover, you can borrow from future months when overspending, or shift planned amounts forward via the Reduce Plan flow. Real budgets bend.

Related reading: The Dashboard.

When increased income gets absorbed into discretionary spending instead of savings or debt paydown — the reason a $20K raise can leave you in the same financial position six months later. The dollars don't disappear; they migrate quietly into nicer takeout, extra subscriptions, slightly bigger everything.

The defense is mechanical: route raises straight to savings or debt before they land in your spending categories. See pay-yourself-first.

Related reading: Lifestyle Creep: How to Spot It Before It Eats Your Raise (blog).

A cash reserve — typically three to six months of essential expenses — earmarked for income loss, medical surprises, or a major repair. Distinct from sinking funds (which are for known future expenses); the emergency fund is for the unknown.

BudgetLabs lets you tag any savings account as part of an emergency fund so the asset view can show "covered months" against your essential spending baseline.

Related reading: How to Build a $1,000 Emergency Fund in 90 Days (blog), Assets & Savings.

Total assets minus total debt. The single number that tells you whether you're getting ahead — independent of whether your monthly cash flow is positive.

BudgetLabs's Lab tab includes a net-worth chart that updates as you log transactions and edit asset values. It's the only metric that captures "you paid down $500 of student loans" and "your 401(k) gained $1,200 this month" in one number.

Related reading: Assets & Savings, Debt tracker, Lab Insights.

Money in minus money out over a period. Different from net worth: net worth is a stock (a snapshot at a moment), cash flow is a flow (movement over time). Healthy budgets have positive cash flow you can deliberately route toward savings, debt, or investments.

The Lab's Sankey diagram visualizes monthly cash flow: income on the left, spending and savings categories on the right, the thickness of each band corresponds to dollars.

A bill that repeats on a predictable cadence: monthly rent, biweekly subscriptions, annual renewals. The defining feature is that you can plan for it. BudgetLabs handles all common cadences (weekly, biweekly, semi-monthly, monthly, annual, multi-year) at the category level.

Recurring is the easy case. The harder ones are the irregular-but-predictable expenses (see true expense and annual event).

Related reading: Categories.

A non-recurring or multi-year expense that needs reservation in this month's budget: holiday gifts (yearly December), car registration (yearly), CPL/concealed carry (every 5 years), passport (every 10 years). BudgetLabs has a dedicated Annual Events feature that surfaces these as one-tap "+$X" chips on the dashboard in the renewal month, so you don't have to remember to bump the relevant category.

Conceptually overlaps with sinking funds; the difference is mechanical. A sinking fund accumulates the dollars over months; an annual event reserves the dollars in the specific month the bill hits.

Related reading: Calendar view.

A visualization where money flows from income sources to spending categories (and savings, and debt). The width of each band corresponds to dollar amount. One look tells you where the bulk of your income actually goes — usually surprises people who thought they "knew where it was going."

BudgetLabs renders a Sankey for each closed monthly archive: see exactly how last month's income flowed through.

Related reading: Monthly archive & Sankey.

A simple budget heuristic: 50% of after-tax income to needs, 30% to wants, 20% to savings and debt paydown. Popularized by Elizabeth Warren in All Your Worth. A starting framework for people who don't want a category-level plan from day one.

BudgetLabs doesn't enforce the 50/30/20 ratios but you can structure your categories to follow them and use the Lab to track adherence over time. Most people who start here end up category-level within a few months.

Treating savings and debt paydown as non-negotiable bills: schedule the transfers on payday before any discretionary spending happens. The simplest hack against lifestyle creep.

Mechanically: a savings category with the appropriate amount and a "Recurring" cadence, a calendar reminder on payday, or — best — an automated bank-side transfer that doesn't require willpower at all.

Non-discretionary: rent, utilities, groceries, healthcare, debt minimums, transportation to work. The dollars you can't easily move without a major life change.

Discretionary: dining out, entertainment, hobbies, travel, premium subscriptions. The dollars that are movable, even if it doesn't feel that way mid-cart-checkout.

When you need to free up cash flow — for emergency-fund build-up, debt acceleration, or a savings goal — the discretionary bucket is the first place to look. The non-discretionary bucket is the second, and it's where the structural moves live (a cheaper apartment, a paid-off car, a different commute).

Income that fluctuates from month to month: freelance, commission, tips, equity vesting, seasonal work. Requires a different planning style than a steady salary — fixed monthly budgets break when the input is variable.

The standard technique: pay yourself a steady "salary" from a buffer account; refill the buffer when income comes in. Budget against the salary, not against the variable income. Smooths the rollercoaster without pretending it doesn't exist.

Related reading: How to Budget When Your Income Is Irregular (blog).

YNAB's framing for irregular but predictable expenses: vehicle repairs, holiday gifts, annual subscriptions, the back-to-school spike. The challenge is that they're real monthly costs even if the cash only leaves your account once or twice a year.

BudgetLabs handles the same idea via two mechanisms: amortization (spread the bill backward across months) and annual events (carve out the dollars in the renewal month with a one-tap apply). Same problem, two mechanically-different solutions for different cases.

Related reading: BudgetLabs vs YNAB (blog) — explains the YNAB true-expense pattern vs BudgetLabs amortization side by side.