UK inflation, take-home pay and public spending calculators with sources and shareable results.
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Compare GBP purchasing power between years, with prices, wages and housing context. RPI covers 1948 onwards; CPI covers 1988 onwards. "now" means the latest stored observation, not a live price.
Starting calendar year.
Amount in GBP; rounded to the nearest penny.
Ending calendar year, or latest available data.
Inflation measure; RPI has the longer history.
Compare GBP purchasing power between years, with prices, wages and housing context. RPI covers 1948 onwards; CPI covers 1988 onwards. "now" means the latest stored observation, not a live price.
| Argument | Type | Description |
|---|---|---|
| to | any | Ending calendar year, or latest available data. |
| from* | integer | Starting calendar year. |
| amount* | number | Amount in GBP; rounded to the nearest penny. |
| series | string | Inflation measure; RPI has the longer history. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"amount",
"from"
],
"properties": {
"to": {
"anyOf": [
{
"type": "integer",
"maximum": 2026,
"minimum": 1948
},
{
"type": "string",
"const": "now"
}
],
"default": "now",
"description": "Ending calendar year, or latest available data."
},
"from": {
"type": "integer",
"maximum": 2026,
"minimum": 1948,
"description": "Starting calendar year."
},
"amount": {
"type": "number",
"maximum": 1000000000000,
"minimum": 0.01,
"description": "Amount in GBP; rounded to the nearest penny."
},
"series": {
"enum": [
"rpi",
"cpi"
],
"type": "string",
"default": "rpi",
"description": "Inflation measure; RPI has the longer history."
}
},
"additionalProperties": false
}Employee income tax and National Insurance for 2026/27, or the gross salary needed for a target net income. England, Wales and Northern Ireland only; Scotland is unsupported. Excludes pensions, student loans, benefits and other income. Includes a historical UK taxpayer income rank.
| Argument | Type | Description |
|---|---|---|
| mode | string | |
| amount* | integer | Annual gross salary (gross mode), or annual target take-home pay (net mode), in whole GBP. Multiply monthly figures by 12 first. |
| region* | string | Confirm the tax jurisdiction; Scottish income tax is not supported. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"amount",
"region"
],
"properties": {
"mode": {
"enum": [
"gross",
"net"
],
"type": "string",
"default": "gross"
},
"amount": {
"type": "integer",
"maximum": 1000000000,
"minimum": 1,
"description": "Annual gross salary (gross mode), or annual target take-home pay (net mode), in whole GBP. Multiply monthly figures by 12 first."
},
"region": {
"enum": [
"england",
"wales",
"northern_ireland"
],
"type": "string",
"description": "Confirm the tax jurisdiction; Scottish income tax is not supported."
}
},
"additionalProperties": false
}Express a GBP amount as a share and duration of a stored 2025-26 public budget, with comparisons against other budgets. The NHS comparison uses England's DHSC day-to-day budget as a proxy. These are illustrative averages, not live spending rates.
| Argument | Type | Description |
|---|---|---|
| amount* | number | Amount in GBP. |
| budget | string | Budget to compare against; response also includes other budgets. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"amount"
],
"properties": {
"amount": {
"type": "number",
"maximum": 1000000000000000,
"minimum": 0.01,
"description": "Amount in GBP."
},
"budget": {
"enum": [
"everything",
"nhs",
"pensions",
"welfare",
"interest",
"education",
"defence",
"borrowing",
"taxes",
"monarchy"
],
"type": "string",
"default": "nhs",
"description": "Budget to compare against; response also includes other budgets."
}
},
"additionalProperties": false
}