Glossary of Terms
Plain-language definitions for every term, abbreviation, and concept used across formulanode's calculation tools. Click any term to jump directly to its definition.
Real Estate Terms
NOI — Net Operating Income
Annual income a property generates after deducting operating expenses — including property taxes, insurance, maintenance, management fees, and landlord-paid utilities — but before mortgage payments, depreciation, and income taxes. NOI is the core input for cap rate calculations because it measures a property's income-producing ability independent of its financing structure. Two properties with identical gross rents can have very different NOIs depending on expense ratios.
Cap Rate — Capitalization Rate
The ratio of a property's Net Operating Income (NOI) to its purchase price or market value, expressed as a percentage. A 5% cap rate means the property generates $5 in annual NOI for every $100 of value. Cap rates are the primary metric for comparing commercial real estate investments and estimating market value — a property generating $100,000 NOI at a 6% market cap rate implies a value of approximately $1.67 million.
Related: NOI, Going-In Cap Rate, Exit Cap Rate
Stabilized Cap Rate — Stabilized Capitalization Rate
A cap rate calculated on a property operating at normal market occupancy with rents at market levels — representing the asset's income at full, steady-state performance. CBRE and other market surveys report stabilized cap rates as the standard benchmark for comparing assets across markets. Stabilized cap rates exclude the effects of temporary vacancy, below-market leases, or transitional lease-up periods.
Related: Value-Add Cap Rate, Cap Rate
Value-Add Cap Rate — Value-Add Capitalization Rate
A cap rate calculated using projected NOI after planned improvements and lease-up, divided by the total cost basis (acquisition price plus capital investment). Value-add cap rates are typically higher than stabilized rates because they price in execution risk — the possibility that renovation costs overrun or lease-up takes longer than projected. Investors compare going-in and value-add cap rates to assess the return potential of a repositioning strategy against its risk.
Related: Stabilized Cap Rate, Going-In Cap Rate
Cap Rate Compression — Capitalization Rate Compression
A decline in cap rates over time, meaning investors are paying more for each dollar of NOI a property generates. Compression reflects rising property values relative to income — typically driven by increased investor demand, low interest rates, or strong rent growth expectations. Markets experiencing compression tend to be competitive and liquid, but buyers entering at compressed cap rates accept lower initial yields in exchange for anticipated appreciation.
Related: Cap Rate Expansion, Cap Rate
Cap Rate Expansion — Capitalization Rate Expansion
An increase in cap rates over time, meaning investors are paying less per dollar of NOI — typically because property values have declined or risk premiums have risen. Expansion can be driven by rising interest rates, economic uncertainty, oversupply, or declining tenant demand. For existing owners, expansion reduces portfolio value; for buyers, it represents an opportunity to acquire assets at higher initial yields than were recently available.
Related: Cap Rate Compression, Cap Rate
Gateway Market — Gateway Real Estate Market
One of a small group of major cities — typically New York, Los Angeles, San Francisco, Chicago, Boston, and Washington D.C. — that attract the deepest pool of global institutional capital: sovereign wealth funds, pension funds, insurance companies, and REITs. Gateway status results in the lowest cap rates nationally, as persistent buyer competition bids up property values relative to income. These markets offer maximum liquidity and exit certainty but the lowest initial yields of any market tier.
Related: Market Tiers
Market Tiers — Gateway / Primary / Secondary / Tertiary Markets
A classification system used by CBRE and other real estate firms to rank markets by transaction volume, liquidity, and institutional investor depth. Gateway markets command the tightest cap rates due to global capital competition. Primary markets (e.g. Phoenix, Atlanta, Denver) attract significant institutional capital with moderate yields. Secondary markets offer higher cap rates with less liquidity. Tertiary markets are smaller cities with the highest cap rates and longest hold periods required for successful exits.
Related: Gateway Market, Cap Rate
Property Class — Class A / Class B / Class C Property
A tiered quality classification for commercial real estate assets. Class A refers to the highest quality — newer construction, prime locations, creditworthy tenants, and modern amenities. Class B assets are older or in secondary locations with moderate rents and mixed tenant quality. Class C properties are the oldest and most functionally obsolete, typically requiring significant capital expenditure. Class B assets typically trade at 50–150 basis points higher cap rates than comparable Class A properties to compensate for higher risk and renovation requirements.
Related: Basis Points, Stabilized Cap Rate
Basis Points — Basis Points (bps)
A unit of measurement equal to one one-hundredth of a percentage point (0.01%). Used in real estate and finance to express small differences in cap rates, interest rates, and yields with precision. A cap rate moving from 5.00% to 5.50% has increased by 50 basis points. The abbreviation is 'bps', pronounced 'bips'. Basis points eliminate ambiguity — saying a rate rose '1%' could mean 1 percentage point or a 1% relative increase; '100 basis points' is unambiguous.
Related: Cap Rate
Going-In Cap Rate — Going-In Capitalization Rate
The cap rate at the time of property acquisition, calculated by dividing the current NOI by the purchase price. The going-in cap rate is the initial yield an investor locks in at closing. It is compared against the projected exit cap rate to model total return over the investment hold period — the difference between these two rates, combined with NOI growth during ownership, drives the majority of CRE investment returns.
Related: Exit Cap Rate, Cap Rate, NOI
Exit Cap Rate — Exit Capitalization Rate
The estimated cap rate at which a property will be sold at the end of the investment hold period. Unlike the going-in cap rate, the exit cap rate is a projection — investors typically underwrite a slightly higher exit cap rate than their entry rate to account for asset aging and market uncertainty. If cap rates expand during the hold period, the exit price falls relative to NOI even if rents have grown; if they compress further, the asset appreciates beyond NOI growth alone.
Related: Going-In Cap Rate, Cap Rate
DSCR — Debt Service Coverage Ratio
The ratio of a property's annual NOI to its annual debt service (total mortgage payments of principal and interest). A DSCR of 1.25 means the property generates $1.25 in NOI for every $1.00 of debt payments. Commercial real estate lenders typically require a minimum DSCR of 1.20–1.25 for loan approval. A DSCR below 1.0 means the property cannot cover its own debt payments from operating income, indicating financial stress.
Finance Terms
LTV — Loan-to-Value Ratio
The ratio of a mortgage loan amount to the appraised value or purchase price of the property, expressed as a percentage. A $700,000 loan on a $1,000,000 property represents a 70% LTV. Lenders use LTV to assess risk — higher LTV means more leverage and a thinner equity cushion if property values decline. Residential lenders typically cap LTV at 80–97% depending on loan type; commercial real estate lenders typically cap at 65–75% for stabilized assets.
Related: DSCR, Amortization
Cash-on-Cash Return — Cash-on-Cash Return
The ratio of annual pre-tax cash flow to the total cash invested (down payment plus closing costs), expressed as a percentage. Unlike cap rate, cash-on-cash return accounts for financing — a property with a 5% cap rate purchased with leverage may deliver a significantly higher cash-on-cash return depending on the interest rate and loan terms. It measures the actual yield on equity invested rather than total property value, making it useful for comparing leveraged investment returns.
PMT — Periodic Payment Formula
The standard financial formula for calculating a fixed periodic payment on a loan: M = P × [r(1+r)^n] / [(1+r)^n − 1], where P is the principal, r is the periodic interest rate, and n is the number of payment periods. All mortgage and auto loan payment calculations on this site use this formula. PMT assumes equal payments throughout the loan term with interest compounding at the same frequency as payments — typically monthly for consumer and real estate loans.
Related: Amortization, APR vs Interest Rate
Amortization — Loan Amortization
The process of paying off a loan through regular scheduled payments that cover both principal and interest. Early payments in an amortization schedule are heavily weighted toward interest; later payments shift toward principal reduction. This front-loaded interest structure means that paying off a loan early or making extra principal payments saves disproportionately more interest than the remaining balance might suggest. A full amortization schedule shows the exact principal and interest breakdown for every payment over the loan term.
APR vs Interest Rate — Annual Percentage Rate vs. Interest Rate
The interest rate is the annual cost of borrowing the principal, expressed as a percentage. APR (Annual Percentage Rate) is broader — it includes the interest rate plus lender fees, discount points, and other loan costs, giving a more complete picture of the true cost of borrowing. For mortgage comparison purposes, APR is more useful than the stated interest rate because it enables apples-to-apples comparison across loans with different fee structures. A loan with a lower rate but high fees may have a higher APR than a loan with a slightly higher rate and no fees.
Related: Closing Costs, PMT
Closing Costs — Mortgage Closing Costs
Fees and expenses paid at the time of closing a real estate transaction, separate from the down payment or loan principal. Common components include lender origination fees, appraisal, title insurance, attorney fees, recording fees, and prepaid items such as property taxes and homeowners insurance. For refinances, closing costs typically range from 2–5% of the loan amount depending on the state. The mortgage refinance break-even calculator on this site uses LodeStar 2025 state-specific closing cost averages as defaults.
Related: Break-Even Point, APR vs Interest Rate
Break-Even Point — Refinance Break-Even Point
In mortgage refinancing, the number of months required for accumulated monthly savings from a lower interest rate to equal the upfront closing costs paid. If refinancing costs $4,000 and saves $200 per month, the break-even point is 20 months. Homeowners who remain in the home longer than the break-even period recoup their costs and benefit financially from the refinance. Selling or refinancing again before reaching break-even means closing costs were not fully recovered.
Related: Closing Costs, Amortization
Tax Terms
SE Tax — Self-Employment Tax
The tax self-employed individuals pay to fund Social Security and Medicare. Employees split these costs with their employer (7.65% each), but self-employed people pay both the employee and employer shares — 15.3% total. SE tax is calculated on 92.35% of net self-employment income rather than 100%, because the IRS allows a deduction equivalent to the employer share. Half of the total SE tax paid is also deductible from federal income tax as an above-the-line deduction, reducing the effective rate further.
QBI — Qualified Business Income Deduction
A federal tax deduction under IRC §199A allowing eligible self-employed individuals and pass-through business owners to deduct up to 20% of qualified business income from taxable income. Under the OBBBA (effective 2026 tax year), the rate remains at 20% with a $400 minimum deduction for taxpayers with at least $1,000 in QBI. The deduction phases out at higher income levels and is subject to restrictions for certain specified service trade or business (SSTB) professions including law, accounting, consulting, and financial services.
Safe Harbor — Estimated Tax Safe Harbor
An IRS rule that protects taxpayers from underpayment penalties on estimated taxes if they pay at least 100% of their prior year's total tax liability during the current year — or 110% if prior year AGI exceeded $150,000. Meeting the safe harbor threshold eliminates the underpayment penalty regardless of how much more tax is ultimately owed. It does not eliminate the tax itself, only the penalty for not paying sufficient estimates during the year.
Related: Estimated Tax, AGI
FICA — Federal Insurance Contributions Act
The federal law mandating Social Security and Medicare payroll taxes. For employees, FICA contributions are split equally between the employee (7.65%) and the employer (7.65%). Self-employed individuals pay both halves as Self-Employment Tax — 12.4% for Social Security (on earnings up to the annual wage base, $184,500 in 2026) and 2.9% for Medicare on all earnings. An additional 0.9% Medicare surtax applies to earned income above $200,000 (single filers) or $250,000 (married filing jointly).
Related: SE Tax, Estimated Tax
AGI — Adjusted Gross Income
Total gross income minus specific above-the-line deductions allowed by the IRS, calculated before applying the standard or itemized deduction. For self-employed individuals, AGI is reduced by the deductible portion of SE tax, self-employed health insurance premiums, and retirement account contributions. AGI is a critical threshold figure — it determines eligibility for many deductions and credits, including the QBI phase-out ranges and the safe harbor 110% rule for taxpayers with prior-year AGI above $150,000.
Related: QBI, Safe Harbor, SE Tax
OBBBA — One Big Beautiful Bill Act
Federal legislation signed July 4, 2025, effective for the 2026 tax year, extending and modifying several provisions of the 2017 Tax Cuts and Jobs Act. Key changes affecting self-employed taxpayers include: the QBI deduction rate maintained at 20% (early drafts proposed 23%), a new $400 minimum QBI deduction for taxpayers with at least $1,000 in qualified business income, and expanded QBI phase-in ranges — $150,000 above threshold for MFJ filers (up from $100,000) and $75,000 for Single/HOH filers (up from $50,000).
Estimated Tax — Quarterly Estimated Tax
Quarterly tax payments required for self-employed individuals and others who do not have income taxes withheld from their earnings. The IRS requires estimated payments if you expect to owe at least $1,000 in federal taxes for the year. Federal due dates are April 15, June 15, September 15, and January 15. California uses a different schedule: April 15, June 15, and January 15 with no third-quarter payment. Underpayment results in IRS penalties calculated based on the shortfall amount and the number of days the payment was late.
Related: Safe Harbor, SE Tax, FICA
Legal Terms
Statute of Limitations — Statute of Limitations
A law that sets the maximum time period after an event within which legal proceedings may be initiated. Once the statute of limitations expires, the claim is permanently barred regardless of its merits — courts will dismiss the case. Limitation periods vary by state and by claim type: personal injury, contract breach, fraud, and property damage each carry their own deadlines. The clock generally starts running on the date of the injury or, under the discovery rule, when the plaintiff discovered or reasonably should have discovered the harm.
Related: Tolling, Discovery Rule, Jurisdiction
Tolling — Tolling of the Statute of Limitations
The legal suspension or pausing of the statute of limitations clock under specific circumstances, effectively extending the deadline to file a claim. Common tolling triggers include the plaintiff being a minor at the time of injury (clock starts when they turn 18), the defendant fraudulently concealing the harm, the plaintiff being mentally incapacitated, active military service, or the defendant being absent from the jurisdiction. Tolling rules vary significantly by state and by claim type — always verify the specific rules applicable to your situation.
Related: Statute of Limitations, Discovery Rule
Noneconomic Damages — Noneconomic Damages
Compensation for harms that do not carry a precise dollar value — including pain and suffering, emotional distress, loss of enjoyment of life, disfigurement, and loss of consortium. In medical malpractice cases, many states have enacted statutory caps limiting noneconomic damage awards to reduce insurance costs and limit jury discretion. These caps apply specifically to the noneconomic portion of a verdict and do not limit recovery of economic damages such as medical bills and lost wages.
Related: Economic Damages, Damage Cap
Economic Damages — Economic Damages
Compensation for quantifiable financial losses resulting from an injury or malpractice — including past and future medical expenses, lost wages and diminished earning capacity, rehabilitation costs, home care expenses, and documented out-of-pocket losses. Unlike noneconomic damages, economic damages are grounded in financial documentation and are generally not subject to statutory caps in medical malpractice cases. Expert testimony from economists and life-care planners is commonly used to calculate future economic loss.
Related: Noneconomic Damages, Damage Cap
Damage Cap — Statutory Damage Cap
A statutory limit on the maximum amount of damages a plaintiff can recover in certain civil cases, most commonly medical malpractice. Caps typically apply to noneconomic damages only, though some states impose caps on total damages. Cap amounts range from $250,000 to over $2 million depending on the state and the type of defendant (individual provider vs. hospital). Some states index their caps to inflation annually. Several states have no cap at all, and caps in some states have been struck down as unconstitutional by state supreme courts.
Related: Noneconomic Damages, Economic Damages, Jurisdiction
Discovery Rule — Discovery Rule
A legal doctrine that delays the start of the statute of limitations clock until the plaintiff discovered — or reasonably should have discovered — the injury and its cause. The discovery rule is particularly significant in medical malpractice and fraud cases where harm may not be immediately apparent. Without the discovery rule, a patient who develops complications years after a negligent procedure might be time-barred before realizing the connection to earlier treatment. The definition of 'reasonable discovery' is interpreted differently across states.
Related: Statute of Limitations, Tolling
Jurisdiction — Legal Jurisdiction
The legal authority of a court to hear a case and apply laws, defined by geographic area or subject matter. In the context of statute of limitations and damage caps, jurisdiction determines which state's laws govern — typically the state where the injury occurred or where the defendant is located and licensed to practice. Filing in the wrong jurisdiction can result in case dismissal regardless of merits. Federal courts have their own jurisdictional rules that may differ from state court standards.
Related: Statute of Limitations, Damage Cap