UK Financial Glossary
Financial terms explained clearly. No jargon, no filler — just the meaning and why it matters to you.
Agreement in Principle
An early indication from a lender of how much they may be willing to lend, before a full mortgage application.
Read definition → Also: Product feeArrangement Fee
A charge linked to a specific mortgage deal. It can make a low-rate deal more expensive than it first appears.
Read definition →Fixed-Rate Mortgage
A mortgage where the interest rate stays the same for a set period, so monthly payments are predictable.
Read definition →Interest-Only Mortgage
A mortgage where monthly payments cover the interest only — the original capital remains outstanding.
Read definition → Also: LTVLoan-to-Value
The ratio of your mortgage to the property's value. A lower LTV usually means access to better mortgage rates.
Read definition →Mortgage Term
The total length of time your mortgage is scheduled to run, usually 25–35 years for repayment mortgages.
Read definition → Also: Capital repayment mortgageRepayment Mortgage
A mortgage where each payment covers interest and part of the capital, so the balance reduces to zero by the end of the term.
Read definition →Remortgage
Switching your mortgage to a new deal — either with your existing lender or a new one — usually when your current deal ends.
Read definition → Also: SDLT / LTT / LBTTStamp Duty
A property tax paid when buying a home. The name and rates vary by UK nation — SDLT in England, LTT in Wales, LBTT in Scotland.
Read definition →Tracker Mortgage
A variable-rate mortgage where your interest rate tracks a reference rate — usually the Bank of England base rate — plus a set margin.
Read definition → Also: SVRStandard Variable Rate
A lender's default mortgage rate, usually applied after a fixed or tracker deal ends. It can change at the lender's discretion.
Read definition →Inflation
The rate at which the general level of prices rises over time, reducing the purchasing power of money.
Read definition →Net Worth
The total value of everything you own minus everything you owe. A snapshot of your overall financial position.
Read definition →Emergency Fund
A pot of savings set aside to cover unexpected expenses or loss of income — typically three to six months of outgoings.
Read definition →Pension Annual Allowance
The maximum amount you can contribute to pensions in a tax year while still receiving tax relief.
Read definition →Dividend Allowance
The amount of dividend income you can receive each tax year before paying dividend tax.
Read definition → Also: CGTCapital Gains Tax
A tax on the profit made when you sell or dispose of an asset that has increased in value.
Read definition →Compound Interest
Interest calculated on both the original amount and the interest already earned, causing savings to grow exponentially over time.
Read definition → Also: PSAPersonal Savings Allowance
The amount of interest you can earn on savings each tax year without paying income tax on it.
Read definition → Also: LISALifetime ISA
A savings account for first-time buyers or retirement that attracts a 25% government bonus on contributions up to £4,000 per year.
Read definition →Stocks and Shares ISA
A tax-efficient wrapper that lets you invest in stocks, funds and bonds without paying tax on growth or dividends.
Read definition →Cash ISA
A savings account where interest is earned free of income tax, sitting within the annual ISA allowance.
Read definition →ISA Allowance
The maximum amount you can save or invest across all ISA types in a single tax year — currently £20,000.
Read definition →APR
The Annual Percentage Rate shows the true yearly cost of borrowing, including interest and compulsory fees.
Read definition → Also: Rep APRRepresentative APR
The APR that at least 51% of successful applicants receive — the rate you are actually offered may differ.
Read definition →Total Cost of Credit
The full amount you repay above the original loan — combining all interest, charges and fees over the loan term.
Read definition →Minimum Payment
The smallest amount you can pay each month on a credit card without incurring a missed payment penalty.
Read definition → Also: Credit Utilisation RatioCredit Utilisation
The percentage of your available credit limit that you are currently using — a key factor in your credit score.
Read definition → Also: DTIDebt-to-Income Ratio
Your total monthly debt payments divided by your gross monthly income — lenders use it to assess affordability.
Read definition →Debt Consolidation
Combining multiple debts into a single loan, usually to simplify repayments or reduce the overall interest rate.
Read definition →Debt Snowball
A debt payoff strategy where you clear the smallest balance first, then roll that payment into the next debt.
Read definition →Debt Avalanche
A debt payoff strategy where you tackle the highest interest rate debt first to minimise total interest paid.
Read definition →Loan Term
The agreed length of time over which a loan is repaid — longer terms mean lower monthly payments but more interest overall.
Read definition → Also: BNPLBuy Now Pay Later
A short-term credit arrangement that lets you receive goods immediately and pay in instalments or after a set period.
Read definition → Also: Plan 1 / Plan 2 / Plan 5Student Loan Plan
The repayment plan assigned to your student loan — each has a different income threshold, interest rate and write-off period.
Read definition →Gross Pay
Your total earnings before any deductions — including income tax, National Insurance, pension contributions and student loan repayments.
Read definition → Also: Take-home payNet Pay
The amount you actually receive in your bank after all deductions have been taken from your gross pay.
Read definition → Also: Pay As You EarnPAYE
The system HMRC uses to collect income tax and National Insurance directly from your wages before you receive them.
Read definition → Also: NI / NICsNational Insurance
A tax on earnings that funds the State Pension, NHS and other benefits. Both employees and employers pay contributions.
Read definition →Personal Allowance
The amount of income you can earn each tax year before you start paying income tax — currently £12,570 for most people.
Read definition →Tax Code
A code from HMRC that tells your employer how much income tax to deduct. The most common is 1257L for standard personal allowance.
Read definition →Salary Sacrifice
An agreement to reduce your gross salary in exchange for a benefit — such as pension contributions — saving both income tax and National Insurance.
Read definition →Pension Contribution
The amount paid into your pension pot each month by you, your employer, or both — with basic-rate tax relief added by HMRC.
Read definition →Hourly Rate
The amount you earn for each hour worked — either your contracted rate or derived by dividing your annual salary by total working hours.
Read definition →Day Rate
The amount a contractor or freelancer charges per day of work — typically higher than an equivalent employed salary to account for tax and benefits.
Read definition →Overtime Pay
Additional pay for hours worked beyond your contracted hours — commonly paid at time and a half or double time depending on your contract.
Read definition → Also: Annual leaveHoliday Entitlement
The number of paid days off you are legally entitled to each year — at least 28 days including bank holidays for full-time UK workers.
Read definition →Notice Period
The amount of time you or your employer must give before ending your employment — either statutory (set by law) or contractual (in your contract).
Read definition → Also: SRPStatutory Redundancy Pay
The minimum redundancy payment your employer must pay, calculated from your age, length of service and weekly pay — up to a legal cap.
Read definition → Also: SMPStatutory Maternity Pay
The minimum maternity pay employers must provide — 90% of average weekly earnings for 6 weeks, then a flat rate for up to 33 weeks.
Read definition →Student Loan Repayment
A deduction taken through PAYE once your income exceeds your plan's threshold — you pay a percentage of earnings above it, not the full monthly loan amount.
Read definition →Payslip
A written statement from your employer showing your gross pay, all deductions and your net pay — a legal right for all employees and workers.
Read definition →kWh
The standard unit used to measure energy consumption. One kWh is the energy used by a 1,000-watt appliance running for one hour.
Read definition →Unit Rate
The price you pay per kWh of gas or electricity — the main variable in your energy bill, set within Ofgem's price cap limits.
Read definition →Standing Charge
A fixed daily charge on your energy bill that covers the cost of supplying energy to your home — regardless of how much you use.
Read definition →Energy Price Cap
Ofgem's limit on the unit rates and standing charges energy suppliers can charge — it does not cap your total bill, only the rates.
Read definition → Also: Fixed-rate tariffFixed Energy Tariff
An energy deal where your unit rate and standing charge are locked for a set period — protecting you from price rises but potentially missing falls.
Read definition → Also: SVTStandard Variable Tariff
The default energy tariff applied when a fixed deal ends — rates can change but are capped by Ofgem's price cap regulations.
Read definition →Direct Debit
A payment method where your supplier estimates your annual usage and spreads the cost into equal monthly payments — reviewed periodically.
Read definition → Also: SMETS2Smart Meter
A digital energy meter that automatically sends usage readings to your supplier — eliminating estimated bills and showing real-time consumption.
Read definition → Also: E7Economy 7
An electricity tariff with cheaper off-peak rates for around seven hours overnight — suited to homes with storage heaters or overnight EV charging.
Read definition → Also: Energy Performance CertificateEPC Rating
A grade from A (most efficient) to G (least efficient) showing how energy-efficient a property is — required when selling or renting a home.
Read definition → Also: ErP ratingBoiler Efficiency
The percentage of fuel a boiler converts into useful heat. Modern condensing boilers are typically 90%+ efficient vs 60–70% for older models.
Read definition →Loft Insulation
Material installed in a loft to reduce heat escaping through the roof — recommended depth is 270mm, and it can cut heating bills significantly.
Read definition → Also: ASHP / GSHPHeat Pump
A low-carbon heating system that extracts heat from the air or ground and transfers it into your home — more efficient than gas boilers in suitable properties.
Read definition →Solar Payback Period
The number of years it takes for solar panel savings to cover the installation cost — typically 8–12 years for UK residential systems.
Read definition → Also: Smart Export GuaranteeSEG Export Tariff
A payment made by energy suppliers for surplus electricity exported back to the grid from solar panels or other renewable sources.
Read definition →MPG
A measure of how far a car travels on one gallon of fuel. Higher MPG means lower running costs — used to compare fuel efficiency between vehicles.
Read definition →Fuel Economy
How efficiently a vehicle uses fuel, measured in MPG (miles per gallon) or L/100km. Better fuel economy means lower running costs per mile.
Read definition → Also: PPMPence Per Mile
The total cost of driving one mile in your vehicle — including fuel, tyres, servicing and depreciation. A useful metric for comparing true running costs.
Read definition →Depreciation
The reduction in a car's value over time. New cars can lose 15–35% in the first year and up to 50–60% over three years — often the biggest cost of car ownership.
Read definition → Also: VED / Road TaxVehicle Excise Duty
An annual tax paid to the DVLA for the right to drive or park a vehicle on public roads — the rate depends on CO2 emissions and the vehicle's age.
Read definition →Business Mileage
Miles driven in your own vehicle for work purposes — excluding commuting. You can claim HMRC's approved mileage rate as a tax-free reimbursement from your employer.
Read definition → Also: AMAPApproved Mileage Allowance Payment
HMRC's approved rate for reimbursing business mileage — currently 45p per mile for the first 10,000 miles and 25p per mile thereafter.
Read definition → Also: Electric Vehicle TariffEV Tariff
A specialist electricity tariff designed for electric vehicle owners, typically offering cheaper off-peak rates overnight to reduce the cost of home charging.
Read definition →Speed Awareness Course
An educational course offered as an alternative to penalty points for minor speeding offences — typically costs £80–£100 and takes half a day to complete.
Read definition → Also: Kilowatt-hourkWh
The unit used to measure an EV battery's capacity and charging cost. A 60kWh battery can typically deliver 200–250 miles of real-world range.
Read definition →BMI
A measure of body weight relative to height, used to indicate whether a person falls into an underweight, healthy, overweight or obese category.
Read definition → Also: BMRBasal Metabolic Rate
The number of calories your body burns at complete rest just to maintain basic functions — breathing, circulation and cell production.
Read definition → Also: Total Daily Energy ExpenditureTDEE
The total number of calories you burn in a day, including your BMR plus all physical activity. This is your maintenance calorie level.
Read definition →Maintenance Calories
The number of calories you need to eat each day to keep your weight stable — equivalent to your TDEE when activity is accounted for.
Read definition →Calorie Deficit
Consuming fewer calories than you burn in a day. A consistent calorie deficit causes the body to use stored fat for energy, resulting in weight loss.
Read definition → Also: MacrosMacronutrients
The three main nutrient groups that provide energy — protein, carbohydrates and fat. Each plays a distinct role in body composition and performance.
Read definition →Protein
A macronutrient essential for building and repairing muscle tissue. Recommended intake is typically 1.6–2.2g per kilogram of body weight for active individuals.
Read definition →Body Fat Percentage
The proportion of your body weight made up of fat. A more meaningful health indicator than BMI alone, as it distinguishes fat from muscle mass.
Read definition →Hydration
The state of having adequate fluid in the body. General guidance is 2–2.5 litres of water per day, though needs vary by body weight, climate and activity level.
Read definition → Also: EDDEstimated Due Date
The predicted date of birth, typically calculated as 40 weeks from the first day of the last menstrual period (LMP). Also called the due date or EDD.
Read definition →Calendar Day
Any day on the calendar — including weekends and bank holidays. Used in contracts and legal deadlines to distinguish from working days only.
Read definition → Also: Business dayWorking Day
A day on which businesses are normally open — typically Monday to Friday, excluding weekends and UK bank holidays. Used in legal and contractual contexts.
Read definition → Also: Public holidayBank Holiday
An official UK public holiday when banks and many businesses are closed. England and Wales have 8 bank holidays per year; Scotland has 9.
Read definition → Also: ISO 8601 weekISO Week
A standardised week numbering system where weeks run Monday to Sunday. Week 1 is the week containing the year's first Thursday. Used widely in business and logistics.
Read definition →Leap Year
A year with 366 days instead of 365, occurring every 4 years to keep the calendar aligned with Earth's orbit. February gains an extra day — the 29th.
Read definition → Also: Greenwich Mean TimeGMT
The time standard at the Prime Meridian in Greenwich, London. The UK uses GMT in winter and BST (British Summer Time, GMT+1) in summer.
Read definition → Also: Coordinated Universal TimeUTC
The global time standard used for international coordination. GMT and UTC are functionally identical for everyday purposes, though UTC is the scientific standard.
Read definition →Time Zone
A region of the world that observes the same standard time, defined by its offset from UTC. The world has 24 main time zones, though many countries use half-hour offsets.
Read definition → Also: BST / Summer TimeDaylight Saving Time
The practice of moving clocks forward by one hour in spring to extend evening daylight. The UK observes BST from the last Sunday in March to the last Sunday in October.
Read definition → Also: NoticeNotice Period
A set number of days — calendar or working — that must pass between giving notice and an action taking effect. Relevant in employment, contracts and tenancy agreements.
Read definition →Percentage
A way of expressing a number as a fraction of 100. For example, 25% means 25 out of every 100 — used widely in discounts, interest rates and tax calculations.
Read definition → Also: ppPercentage Point
The arithmetic difference between two percentages. If interest rates rise from 3% to 5%, that is a 2 percentage point increase — not a 2% increase.
Read definition → Also: Value Added TaxVAT
A consumption tax added to the price of most goods and services in the UK. The standard rate is 20%; a reduced rate of 5% applies to some goods such as domestic energy.
Read definition → Also: Price inc. VATGross Price
The total price including VAT — the amount a customer actually pays. To find the net price, divide the gross price by 1.2 (at 20% VAT).
Read definition → Also: Price ex. VATNet Price
The price before VAT is added — the base amount used in business-to-business transactions. Multiply the net price by 1.2 to get the gross price at the 20% rate.
Read definition →Discount
A reduction in the original price of a product or service — expressed as a percentage off or a fixed pound amount. The sale price equals the original price minus the discount.
Read definition →Unit Price
The cost of a single standard unit of a product — such as per 100g or per litre. Comparing unit prices is the most reliable way to find the best value when sizes differ.
Read definition →Ratio
A comparison of two or more quantities expressed as a relationship — for example, 3:1 means there is three times as much of the first quantity as the second.
Read definition →Proportion
A statement that two ratios are equal. Used in scaling recipes, maps and problems where quantities change at a consistent rate relative to each other.
Read definition →Rounding
Approximating a number to a specified degree of precision — such as to the nearest whole number, decimal place or significant figure. The standard rule is to round up from 5.
Read definition →Serving
A standardised amount of food used as a reference on nutrition labels and in recipes. A serving size is defined by the manufacturer or recipe author and may differ from a typical portion.
Read definition →Portion
The amount of food actually put on a plate or eaten at one time. A portion may be larger or smaller than the defined serving size shown on a nutrition label.
Read definition → Also: YieldRecipe Yield
The total number of servings or quantity of food a recipe produces. Knowing the yield is essential for scaling a recipe up or down accurately.
Read definition →Scale Factor
The number by which you multiply each ingredient in a recipe when scaling. If a recipe serves 4 and you need 10, the scale factor is 2.5.
Read definition → Also: US cupCup Measurement
A volume unit used in US, Australian and some UK recipes. One US cup equals approximately 240ml. The weight in grams varies significantly depending on the ingredient.
Read definition → Also: tbspTablespoon
A standard volume measurement equal to 15ml (3 teaspoons). Used widely in recipes for liquid and dry ingredients — always level unless the recipe specifies heaped.
Read definition → Also: tspTeaspoon
A standard volume measurement equal to 5ml. The smallest common cooking measurement — used for spices, baking powder, salt and small amounts of liquid.
Read definition → Also: GMGas Mark
A temperature scale used on gas ovens in the UK and Ireland, running from Gas Mark ¼ (very low) to Gas Mark 10 (very hot). Gas Mark 6 is approximately 200°C / 400°F.
Read definition → Also: Convection ovenFan Oven
An oven with a fan that circulates hot air for more even cooking. Fan ovens typically run 15–20°C hotter than conventional ovens, so recipes often specify a lower temperature for fan settings.
Read definition →Cost Per Serving
The total ingredient cost of a recipe divided by the number of servings it produces. Useful for meal planning, budgeting and comparing home cooking to buying ready-made food.
Read definition →Metric System
The international standard system of measurement based on multiples of 10. Used in science and most of the world — including the UK officially, though imperial units remain common in everyday life.
Read definition → Also: Imperial systemImperial Units
The traditional British system of measurement — including miles, yards, feet, inches, pounds, stones, ounces, pints and gallons. The UK uses a mix of imperial and metric depending on context.
Read definition → Also: Conversion ratioConversion Factor
A number used to convert a measurement from one unit to another. To convert miles to kilometres, multiply by 1.60934 — that is the conversion factor.
Read definition → Also: Meter (US spelling)Metre
The base unit of length in the metric system. One metre equals 100 centimetres, 1,000 millimetres, or approximately 3.28 feet and 39.37 inches.
Read definition → Also: cmCentimetre
One hundredth of a metre. Commonly used for everyday length measurements — height, clothing sizes and small distances. One centimetre equals approximately 0.394 inches.
Read definition → Also: kgKilogram
The base unit of mass in the metric system. One kilogram equals 1,000 grams, approximately 2.205 pounds or 0.157 stone.
Read definition → Also: lb / lbsPound
An imperial unit of mass equal to 16 ounces or approximately 0.453 kilograms. Commonly used in the UK for body weight alongside stone and for food portions.
Read definition → Also: LLitre
The standard metric unit of volume, equal to 1,000 millilitres or approximately 1.76 UK pints. Used for liquids in the UK including fuel, milk and soft drinks.
Read definition → Also: °C / CentigradeCelsius
The metric temperature scale where water freezes at 0°C and boils at 100°C. The standard temperature unit in the UK for weather, cooking and science.
Read definition → Also: °FFahrenheit
An imperial temperature scale where water freezes at 32°F and boils at 212°F. Still used in the United States and in some older UK recipes. To convert to Celsius: subtract 32, multiply by 5, divide by 9.
Read definition →Word Count
The total number of words in a piece of text. Used to check essay lengths, article targets and character limits — most tools count hyphenated words as one word.
Read definition → Also: Character limitCharacter Count
The total number of individual characters in a text string — including letters, numbers, spaces and punctuation. Used for SMS limits, social media posts and meta descriptions.
Read definition →Readability Score
A numerical measure of how easy a piece of text is to read. Scores are typically based on sentence length and word complexity — a higher Flesch score means easier reading.
Read definition → Also: Flesch scoreFlesch Reading Ease
A readability formula that scores text from 0 to 100. A score of 60–70 is considered plain English suitable for most adults. Higher scores indicate simpler text.
Read definition → Also: Sentence capitalisationSentence Case
A text formatting style where only the first letter of a sentence and proper nouns are capitalised. The standard style for body text and most written English.
Read definition → Also: Headline caseTitle Case
A capitalisation style where the first letter of most words is capitalised. Used in headings, titles and proper names — minor words like "the", "and" and "of" are usually lowercase.
Read definition → Also: Placeholder textLorem Ipsum
A block of scrambled Latin used as placeholder text in design and typesetting. It fills space without distracting from layout — the text has no meaningful content and is not intended to be read.
Read definition → Also: Quick Response CodeQR Code
A square barcode that encodes data — typically a URL — readable by a smartphone camera. QR stands for Quick Response, reflecting how fast the code can be scanned and decoded.
Read definition → Also: Entropy bitsPassword Entropy
A measure of how unpredictable — and therefore secure — a password is. Measured in bits: every additional bit doubles the number of possible combinations an attacker must try.
Read definition →Strong Password
A password that is difficult to guess or crack — typically at least 12 characters long and mixing uppercase letters, lowercase letters, numbers and symbols. Longer is always more secure than complex.
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