Monthly intelligence on the U.S. federal interest burden — how much of the budget debt service consumes — from the Treasury Monthly Treasury Statement table 9 (function 900 Net Interest, function 050 National Defense, total outlays, total receipts, customs duties) joined to the official average interest rate on Treasury securities (keyless FiscalData APIs). Each row is one calendar month (2015-03 -> present, MTS lags ~2 weeks): raw monthly amounts plus trailing-12-month sums, the deficit TTM, interest share of outlays, the interest-vs-defense ratio, interest per customs-duty dollar, the official effective rate, year-over-year TTM interest growth, and a documented 0-100 interest_burden_score ranked as burden_rank with record_interest_flag, interest_exceeds_defense_flag, and first_trillion_interest_month_flag. Units: USD millions (monthly), USD billions (trailing-12m), percent, ratios, scores. Caveats: nominal USD; budget outlays, not cash flows; MTS publishes ~2 weeks after month-end. Primary key: (record_date). Cadence: monthly; as_of is the latest published MTS month, so identical input produces an identical content hash. U.S. federal government work (public domain) — commercial_use = yes, attribution required. Sample use: track interest_burden_score and interest_vs_defense_ratio for the fiscal cost of the national debt.

Source: U.S. Treasury — interest-burden intelligence
Rows: 138
Columns: 28
Source cadence: Monthly
Last refreshed: Sep 27, 2026
Theme: economy

Column	Type	Description
as_of	string	Latest published MTS month (YYYY-MM-DD) in the panel; month-granular as-of stamping so identical upstream input yields an identical content hash.
record_date	string	Month-end date (YYYY-MM-DD, primary key). The panel is a contiguous calendar-month sequence from 2015-03-31; MTS publishes ~2 weeks after month-end.
country	string	Canonical country name (United States) for every row.
country_code	string	ISO 3166-1 alpha-3 code for the United States (USA) — the join key for the 'Enrich with public data' feature. (unit: code)
net_interest_monthly_millions	float	MTS table 9 'Net Interest' (budget function 900) outlays for the month, in USD millions as published. (unit: USD millions)
national_defense_monthly_millions	float	MTS table 9 'National Defense' (budget function 050) outlays for the month, in USD millions as published. (unit: USD millions)
customs_duties_monthly_millions	float	MTS table 9 'Customs Duties' receipts for the month, in USD millions as published. Budget receipts basis (distinct from the daily DTS cash deposits in us_tariff_revenue_signals). Can be negative in refund months: after the Supreme Court struck down the IEEPA tariffs on 2026-02-20, CBP refunds exceeded collections (2026-06-30: -$25.56B, 2026-07-31: -$8.55B); the trailing-12m figure is the reliable lens. (unit: USD millions)
total_outlays_monthly_millions	float	MTS table 9 'Total' net outlays for the month, in USD millions as published. (unit: USD millions)
total_receipts_monthly_millions	float	MTS table 9 'Total' receipts for the month, in USD millions as published. (unit: USD millions)
net_interest_ttm_billions	float	Trailing-12-calendar-month sum of net interest outlays, in USD billions. Fiscal-calendar safe (immune to October resets). Null for the first 11 months of the panel. (unit: USD billions)
national_defense_ttm_billions	float	Trailing-12-month sum of national defense outlays, in USD billions. Null for the first 11 months. (unit: USD billions)
customs_duties_ttm_billions	float	Trailing-12-month sum of customs duty receipts, in USD billions. Null for the first 11 months. (unit: USD billions)
total_outlays_ttm_billions	float	Trailing-12-month sum of total net outlays, in USD billions. Null for the first 11 months. (unit: USD billions)
total_receipts_ttm_billions	float	Trailing-12-month sum of total receipts, in USD billions. Null for the first 11 months. (unit: USD billions)
deficit_ttm_billions	float	Trailing-12-month (receipts minus outlays), in USD billions. Negative = deficit. Null for the first 11 months. (unit: USD billions)
interest_share_of_outlays_pct	float	Trailing-12m net interest as a percent of trailing-12m total outlays — the budget share eaten by debt service. Null for the first 11 months. (unit: percent)
interest_vs_defense_ratio	float	Trailing-12m net interest divided by trailing-12m national defense outlays. Above 1.0 means interest costs exceed defense spending. Null for the first 11 months. (unit: ratio)
interest_per_customs_dollar	float	Trailing-12m net interest divided by trailing-12m customs duty receipts — how many dollars of interest each tariff dollar must cover. Null for the first 11 months. (unit: ratio)
treasury_avg_interest_rate_pct	float	Official average interest rate on U.S. Treasury securities ('Total Interest-bearing Debt' row of the FiscalData average-interest-rates table), in percent. Reference series from a separate table on its own publication schedule. (unit: percent)
yoy_net_interest_ttm_pct	float	Year-over-year percent change of trailing-12m net interest. Null for the first 23 months. (unit: percent)
interest_burden_score	float	Documented 0-100 burden score: 100 * window-min-max of (0.5 * min-max(interest_share_of_outlays_pct) + 0.5 * min-max(winsorized interest_vs_defense_ratio at 0.5..1.5)). Rescaled so the window's heaviest month scores exactly 100 and the lightest exactly 0; degenerate windows score 50. (unit: score)
burden_rank	integer	Rank of interest_burden_score descending within the panel (1 = heaviest burden); ties broken by later record_date first (deterministic).
record_interest_flag	boolean	True when the month's trailing-12m net interest is an all-time high for the panel.
interest_exceeds_defense_flag	boolean	True when trailing-12m net interest exceeds trailing-12m national defense outlays (interest_vs_defense_ratio > 1).
trillion_interest_flag	boolean	True when trailing-12m net interest is at or above $1 trillion.
first_trillion_interest_month_flag	boolean	True only for the first month in the panel whose trailing-12m net interest reached $1 trillion.
source_url	string	FiscalData API table URL for MTS table 9 (receipts and outlays by function). (unit: URL)
row_hash	string	SHA-256 (16 hex chars) over the row's content fields; identical input yields an identical hash, so a re-run on unchanged upstream data is a no-op. (unit: hash)

First 10 sample rows — a preview, not the complete dataset.

as_of	record_date	country	country_code	net_interest_monthly_millions	national_defense_monthly_millions	customs_duties_monthly_millions	total_outlays_monthly_millions	total_receipts_monthly_millions	net_interest_ttm_billions	national_defense_ttm_billions	customs_duties_ttm_billions	total_outlays_ttm_billions	total_receipts_ttm_billions	deficit_ttm_billions	interest_share_of_outlays_pct	interest_vs_defense_ratio	interest_per_customs_dollar	treasury_avg_interest_rate_pct	yoy_net_interest_ttm_pct	interest_burden_score	burden_rank	record_interest_flag	interest_exceeds_defense_flag	trillion_interest_flag	first_trillion_interest_month_flag	source_url	row_hash
2026-08-31	2015-03-31	United States	USA	15,732.8	49,221.3	2,626.6	287,097.4	234,187.3	—	—	—	—	—	—	—	—	—	2.356	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	14889c707d6e1e3d
2026-08-31	2015-04-30	United States	USA	25,120.9	48,150.2	3,429.8	315,087.2	471,801.2	—	—	—	—	—	—	—	—	—	2.363	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	1d56e3d95582ac15
2026-08-31	2015-05-31	United States	USA	27,535.3	48,237.1	2,547.8	294,771.1	212,385.8	—	—	—	—	—	—	—	—	—	2.368	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	7a879b63253467f1
2026-08-31	2015-06-30	United States	USA	22,347.8	49,317.5	2,941.1	291,157.3	342,933.1	—	—	—	—	—	—	—	—	—	2.336	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	f60c7d053bf67efd
2026-08-31	2015-07-31	United States	USA	27,481.2	51,467.9	3,601.7	374,680.1	225,493.4	—	—	—	—	—	—	—	—	—	2.337	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	9fdd9f7c3b21e7df
2026-08-31	2015-08-31	United States	USA	25,365.8	40,441	1,907.5	275,257.4	210,836.8	—	—	—	—	—	—	—	—	—	2.337	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	9e2fd3694d816235
2026-08-31	2015-09-30	United States	USA	-11,344.1	55,078.4	3,197.8	274,412.3	365,472.8	—	—	—	—	—	—	—	—	—	2.35	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	10f37cbe1a50066e
2026-08-31	2015-10-31	United States	USA	20,004.9	60,443.3	3,435.5	347,578.3	211,046.2	—	—	—	—	—	—	—	—	—	2.368	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	be86e26c21c25954
2026-08-31	2015-11-30	United States	USA	21,368.6	43,413.6	2,886.8	269,520.7	204,967.8	—	—	—	—	—	—	—	—	—	2.324	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	91be4b155739c394
2026-08-31	2015-12-31	United States	USA	21,431.2	56,590.3	2,890.7	364,074.7	349,630.7	—	—	—	—	—	—	—	—	—	2.331	—	—	—	false	false	false	false	https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/mts/mts_table_9	f07cd2e7aba0adb3

Sep 27, 2026Current
20260927T024319Z-0203305a8661 · sha256 0203305a8661…
138 rows · first snapshot

Point any LLM at the metadata endpoint — the documentation above is machine-readable too (JSON-LD + Croissant).

cURL

curl "https://datazimuts.com/v1/datasets/us_interest_burden_signals/us_interest_burden_monthly" | jq '{title, rows, columns_count, license}'

Python

import requests

ds = requests.get("https://datazimuts.com/v1/datasets/us_interest_burden_signals/us_interest_burden_monthly").json()
print(ds["title"], ds["rows"], "rows")

# Sample rows for an LLM context window
for row in ds.get("sample_rows", [])[:5]:
    print(row)

API endpoint: https://datazimuts.com/v1/datasets/us_interest_burden_signals/us_interest_burden_monthly

Tip: fetch /llms.txt for the full machine-readable catalog.

Where this data comes from and what was made from it. Other people's work shows as counts; only shared projects are named.

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Pinned to snapshot 20260927T024319Z-0203305a8661 and its content hash, so readers get exactly the data you used.

APA

U.S. Treasury — interest-burden intelligence. (2026). US federal interest-burden intelligence (monthly) [Data set, snapshot 20260927T024319Z-0203305a8661, sha256 0203305a8661]. Datazimuts. Retrieved 2026-09-27, from https://datazimuts.com/en/datasets/us_interest_burden_signals/us_interest_burden_monthly?snapshot=20260927T024319Z-0203305a8661

BibTeX

@misc{dz_us_interest_burden_signals_us_interest_b_0203305a,
  title        = {{US federal interest-burden intelligence (monthly)}},
  author       = {{U.S. Treasury — interest-burden intelligence}},
  year         = {2026},
  publisher    = {Datazimuts},
  howpublished = {\url{https://datazimuts.com/en/datasets/us_interest_burden_signals/us_interest_burden_monthly?snapshot=20260927T024319Z-0203305a8661}},
  note         = {Snapshot 20260927T024319Z-0203305a8661, sha256 0203305a8661de14d2534cf4296f5c823d9a07c7ef17b5bc9bcdc4c2aabbc4f8; accessed 2026-09-27}
}

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US federal interest-burden intelligence (monthly)

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