diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3abbbb7fc..497d194a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,12 @@ Classify the change according to the following categories:
     ##### Removed
     ### Patches
 
+## add-capex-constraint
+### Minor Updates
+#### Added
+- Add **Financial** inputs **min_initial_capital_costs_before_incentives** and **max_initial_capital_costs_before_incentives**
+- Add **CHP** output **initial_capital_costs**
+
 ## v3.12.3
 ### Minor Updates
 ### Added
@@ -49,7 +55,7 @@ Classify the change according to the following categories:
 
 ## v3.12.0
 ### Major Updates
-### Added 
+#### Added 
 - Add inputs: 
   - **ElectricUtility.cambium_cef_metric** to utilize clean energy data from NREL's Cambium database
   - **ElectricUtility.renewable_energy_fraction_series** to supply a custom grid clean or renewable energy scalar or series
diff --git a/julia_src/Manifest.toml b/julia_src/Manifest.toml
index fc3e1581e..03d5186ee 100644
--- a/julia_src/Manifest.toml
+++ b/julia_src/Manifest.toml
@@ -922,9 +922,9 @@ uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
 [[deps.REopt]]
 deps = ["ArchGDAL", "CSV", "CoolProp", "DataFrames", "Dates", "DelimitedFiles", "HTTP", "JLD", "JSON", "JuMP", "LinDistFlow", "LinearAlgebra", "Logging", "MathOptInterface", "Requires", "Roots", "Statistics", "TestEnv"]
-git-tree-sha1 = "9946abe774e30d82f786e68296ad1fdf8bb7dba4"
+git-tree-sha1 = "0790dface6f78d2cadae8020470a4e73ee531f93"
 uuid = "d36ad4e8-d74a-4f7a-ace1-eaea049febf6"
-version = "0.51.1"
+version = "0.52.0"
 
 [[deps.Random]]
 deps = ["SHA"]
diff --git a/reoptjl/migrations/0085_financialinputs_max_initial_capital_costs_before_incentives_and_more.py b/reoptjl/migrations/0085_financialinputs_max_initial_capital_costs_before_incentives_and_more.py
new file mode 100644
index 000000000..5a02b6559
--- /dev/null
+++ b/reoptjl/migrations/0085_financialinputs_max_initial_capital_costs_before_incentives_and_more.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.0.7 on 2025-05-08 04:49
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('reoptjl', '0084_merge_20250424_1814'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='financialinputs',
+            name='max_initial_capital_costs_before_incentives',
+            field=models.FloatField(blank=True, help_text='Maximum up-front capital cost for all technologies, excluding replacement costs and incentives [\$].', null=True, validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(1000000000000.0)]),
+        ),
+        migrations.AddField(
+            model_name='financialinputs',
+            name='min_initial_capital_costs_before_incentives',
+            field=models.FloatField(blank=True, help_text='Minimum up-front capital cost for all technologies, excluding replacement costs and incentives [\$].', null=True, validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(1000000000000.0)]),
+        ),
+    ]
diff --git a/reoptjl/migrations/0086_chpoutputs_initial_capital_costs.py b/reoptjl/migrations/0086_chpoutputs_initial_capital_costs.py
new file mode 100644
index 000000000..5107d9a19
--- /dev/null
+++ b/reoptjl/migrations/0086_chpoutputs_initial_capital_costs.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.0.7 on 2025-05-08 18:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('reoptjl', '0085_financialinputs_max_initial_capital_costs_before_incentives_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='chpoutputs',
+            name='initial_capital_costs',
+            field=models.FloatField(blank=True, help_text='Initial capital costs of the CHP system, before incentives [\\$]', null=True),
+        ),
+    ]
diff --git a/reoptjl/models.py b/reoptjl/models.py
index fdef159a8..184df44a4 100644
--- a/reoptjl/models.py
+++ b/reoptjl/models.py
@@ -786,6 +786,24 @@ class FinancialInputs(BaseModel, models.Model):
         default=0.0,
         help_text=("Only applicable when off_grid_flag is true. These per year costs are considered tax deductible for owner.")
     )
+    min_initial_capital_costs_before_incentives = models.FloatField(
+        validators=[
+            MinValueValidator(0),
+            MaxValueValidator(1e12)
+        ],
+        blank=True,
+        null=True,
+        help_text=("Minimum up-front capital cost for all technologies, excluding replacement costs and incentives [\$].")
+    )
+    max_initial_capital_costs_before_incentives = models.FloatField(
+        validators=[
+            MinValueValidator(0),
+            MaxValueValidator(1e12)
+        ],
+        blank=True,
+        null=True,
+        help_text=("Maximum up-front capital cost for all technologies, excluding replacement costs and incentives [\$].")
+    )
     CO2_cost_per_tonne = models.FloatField(
         validators=[
             MinValueValidator(0),
@@ -4728,6 +4746,10 @@ class CHPOutputs(BaseModel, models.Model):
         models.FloatField(null=True, blank=True),
         default = list,
     )
+    initial_capital_costs = models.FloatField(
+        null=True, blank=True,
+        help_text="Initial capital costs of the CHP system, before incentives [\$]"
+    )
 
     def clean():
         pass
diff --git a/reoptjl/test/posts/all_inputs_test.json b/reoptjl/test/posts/all_inputs_test.json
index 6811af43c..78fa2a4a2 100644
--- a/reoptjl/test/posts/all_inputs_test.json
+++ b/reoptjl/test/posts/all_inputs_test.json
@@ -26,7 +26,9 @@
         "PM25_onsite_fuelburn_cost_per_tonne": null,
         "NOx_cost_escalation_rate_fraction": null,
         "SO2_cost_escalation_rate_fraction": null,
-        "PM25_cost_escalation_rate_fraction": null
+        "PM25_cost_escalation_rate_fraction": null,
+        "min_initial_capital_costs_before_incentives": null,
+        "max_initial_capital_costs_before_incentives": null
     },
     "ElectricLoad": {
         "annual_kwh": 190000.0,