← All Budget Categories

Net Interest on Debt

Current Spending
$881.0B
Optimal Spending
$881.0B
Gap
$0 (+0.0%)
Near optimal
Evidence Grade
C
Moderate evidence
Non-discretionary

Fixed-Budget Reallocation

This is a non-discretionary entitlement, excluded from reallocation. Spending is held at the current level of $881.0B.

Current vs Optimal

Current$881.0B
Optimal$881.0B
Marginal return per dollar: 0.00%

Diminishing Returns Analysis

Model Type
Log-linear
R² (Model Fit)
0%
N = 0 observationsLow fit (R²<0.3) — treat with cautionSmall sample (n≤10) — may overfit

Outcome Metrics

Debt-to-GDP Ratio
124
increasing
Sovereign Credit Rating (S&P)
85
stable

MaintainRECOMMENDATION

Spending on Net Interest on Debt should be increased by $0 (+0.0%) to reach the optimal allocation of $881.0B.

Marginal Return
0.00%
Share of Total Budget
13.1%
Income Effect
+0%
Health Effect
+0%

Budget Context

Category share (current)13.1%
Category share (optimal)10.6%

How Is Optimal Calculated?

The Optimal Budget Generator (OBG) uses a diminishing-returns framework to allocate spending across categories. Each budget category is modeled with a concave utility function — the first dollar spent on a category produces more welfare than the billionth dollar.

Budget Impact Score (BIS)

Each category's BIS is computed from outcome metrics weighted by their importance to overall welfare. The BIS captures how effectively each marginal dollar translates into measurable improvements in health, education, security, and quality of life.

Diminishing Returns Model

Spending follows a logarithmic utility curve: U(x) = α · ln(x + 1) where α is calibrated from the category's marginal return coefficient. The optimal allocation equalizes the marginal utility per dollar across all categories — the point where reallocating $1 from any category to another would not improve total welfare.

Marginal Return (0.00% for Net Interest on Debt)

The marginal return of 0.00% means each additional dollar currently spent on Net Interest on Debt produces 0.00 cents of welfare value. Categories with higher marginal returns are underfunded relative to their potential; those with lower returns are overfunded.

The total budget constraint is maintained at $6.75T. The optimizer reallocates within this envelope to maximize aggregate welfare measured by the BIS-weighted outcome metrics across all 19 categories.

See the Optimal Budget Generator paper for full methodology.

← All Categories

Generated 3/12/2026 · Optimitron OBG

Optimitron — The Evidence-Based Earth Optimization Machine