United Kingdom version
How it works
Interpolate between two actual comparable quotes without claiming an insurer age table or an actuarial premium forecast.
This is the United Kingdom planning view, with monetary inputs and outputs in GBP. A currency label does not establish that a tax rate, construction price, coverage rule or legal limit has been verified locally. The inputs and limitations below describe the actual scope.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
5-
?lowerAge=Age of lower-age quoteNumber · Required · Default: 30
-
?lowerPremium=Annual premium at lower quoted ageMoney · Required · Default: 400
-
?upperAge=Age of upper-age quoteNumber · Required · Default: 50
-
?upperPremium=Annual premium at upper quoted ageMoney · Required · Default: 1,000
-
?age=Age inside the quoted intervalNumber · Required · Default: 40
Outputs
2-
annualPremiumInterpolated annual quote scenarioCurrency · Primary output · Currency: GBP
-
monthlyEquivalentMonthly equivalent before payment feesCurrency · Currency: GBP
Formula
premium = exp(log(lower quote) + position within quoted ages × (log(upper quote) − log(lower quote))).
Calculations retain numeric precision internally. Displayed values are rounded for readability. Quantities that must be purchased as whole units are rounded up only where the formula explicitly requires it.
Read the inputs before calculating
- Age of lower-age quote: Enter the quantity described by the label.
- Annual premium at lower quoted age: Enter the quantity described by the label.
- Age of upper-age quote: Enter the quantity described by the label.
- Annual premium at upper quoted age: Enter the quantity described by the label.
- Age inside the quoted interval: Enter the quantity described by the label.
Reproducible worked example
The following is a fictional arithmetic example, not a local quote, a verified claimant or a market forecast. Its values are included so the formula can be checked. The form does not automatically confirm any verification checkbox.
| Input | Example value |
|---|---|
| Age of lower-age quote | 30 |
| Annual premium at lower quoted age | 400 |
| Age of upper-age quote | 50 |
| Annual premium at upper quoted age | 1,000 |
| Age inside the quoted interval | 40 |
| Output | Calculated result |
|---|---|
| Interpolated annual quote scenario | GBP 632.4555 |
| Monthly equivalent before payment fees | GBP 52.7046 |
Interpreting a changed assumption
Start with one complete scenario and change only one input when diagnosing a difference. Recheck units, the period of every rate, whether an amount is recurring or one-off, and whether a cost is already included elsewhere. A larger calculated benefit is not evidence that an assumption is more likely to occur.
Limitations
- Use actual policy wording, quotes and jurisdiction-specific requirements. This is a planning worksheet, not a coverage recommendation, insurer quote or determination of a payable claim.
- Interpolation is a hypothetical comparison, not underwriting. Both quotes must match coverage, term, health, tobacco status, occupation, sex where legally permitted, and insurer basis. No extrapolation beyond the two ages is allowed.
Frequently asked questions
What does this Life Premium Between Quoted Ages result represent?
Interpolate between two actual comparable quotes without claiming an insurer age table or an actuarial premium forecast. It applies the displayed formula to your inputs; it does not infer omitted facts.
Are the starting amounts verified United Kingdom prices or legal rules?
No. Numeric defaults are illustrative unless an input or dated reference explicitly identifies a researched component. Currency is GBP; local quotes, eligibility and unsupported rules must be entered and verified separately.
What must I check before relying on the result?
Use actual policy wording, quotes and jurisdiction-specific requirements. This is a planning worksheet, not a coverage recommendation, insurer quote or determination of a payable claim.
Can I compare or share different assumptions?
Change one assumption at a time and use the browser-local project or share controls. A shared URL contains the encoded input values; do not include information you do not wish to disclose.
Sources and reference scope
- NAIC consumer insurance resources — retrieved 2026-09-24. US coverage education. Not a quote, underwriting table or a substitute for another country’s regulator.
- NAIC insurance glossary — retrieved 2026-09-24. Terminology only; policy wording and local law govern actual coverage.
These references support only their stated scope. They are not evidence that every local rule or price needed by the master expansion has been loaded.