PACE Financing Calculator
The formula
What the the retrofit that sells itself tells you
Property Assessed Clean Energy: long-term, on-tax assessment financing tied to the property for energy/water upgrades.
Calculation: Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill). Enter your inputs and every substitution is shown below the result.
Reading the result
180k of HVAC/solar at 6.2/20 = 14k assessment vs 24k savings — positive day one.
Rules of thumb: Rates 4.5–8%; 15–30 year terms
Limitations and best practice
Mortgage lenders scrutinize senior assessments; disclose at refi/sale to avoid title surprises.
This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Frequently asked questions
Residential available?
What happens at refinance?
Rate vs a loan?
Source & methodology
PACENational Association C-PACE data.
PACE Financing explained: formula, worked example and honest limits
This page was written for one job: turning your own inputs into a defensible figure, with the working shown. There are plenty of pages about PACE Financing; almost none of them show the working. This one does: the formula, every input, a fully computed example, and a sensitivity analysis calculated live from this engine’s own defaults.
The number itself is the easy part. What takes judgement is knowing which inputs are facts in your situation and which are guesses wearing a decimal point — a distinction this page makes explicit for every field above.
The useful way to hold PACE Financing is as a ratio with a story attached: Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill) says how the parts combine, and the $21,388 figure above is simply that sentence written in numbers. Everything that follows unpacks one clause of the sentence at a time.
Every figure in the prose is generated by the engine rather than written beside it — the worked example resolves to annual assessment = $21,388 on the default inputs, and the sensitivity section ranks the inputs that move the result — Efficiency retrofit cost first, at ≈10.0 % of the headline for a ten-percent error either way in that input — which is the thread the rest of this guide pulls on.
Inside the PACE Financing calculation: formula and every input
Here is the complete model this tool runs — Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill) — with each input explained below. If a competitor’s page gives you a different answer from the same inputs, this is the text that settles which of you is right.
Efficiency retrofit cost ($) (example value 240,000) is a plain measured quantity — the unit shown in the label is the unit the formula expects. Use the figure exactly as the source document states it, not a rounded memory of it — an omitted line is the classic silent error.
PACE assessment rate (%) (example value 6) is a measured number in the unit named by the label; the formula does not convert for you. Check the convention first: if the source says “6.5 % per year”, type 6.5 and let the formula do the rest.
Assessment term (years) (example value 20) is a measured number in the unit named by the label; the formula does not convert for you. Be precise about the boundary (exact date, start of month); time inputs decide the exponent in most formulas.
Annual energy savings ($) (example value 55,750) is a quantity rather than a category — precision here is cheap and worth having. Take this figure from a label, a report or a prescription — never from a guess.
PACE Financing on the example inputs: the complete substitution
The tool prints its own working; this is the same arithmetic on the example values, reproduced so you can follow it by hand. Starting figures: Efficiency retrofit cost ($), PACE assessment rate (%), Assessment term (years), Annual energy savings ($). The computed annual assessment comes out at $21,388, which the interpretation band labels “Cash-flow positive from day one: $34,362/yr net savings — and the obligation transfers with the property, not you”.
- Amortize $240,000 at 6.5%/20y → $21,388/yr
- Savings $55,750 − assessment = $34,362
- Recovers on the property-tax bill line
Net annual position — $34,362. This is the number experienced users quote when the headline alone would mislead.
Assessment as % of savings — 38.4 %. If your inputs change, this is usually the first companion figure to move.
Total cost financed — $427,756. Compare it against the main result of $21,388 before drawing conclusions.
Transferability value — $8,555.13. If your inputs change, this is usually the first companion figure to move.
Keep this worked example open while you enter your own figures: matching the shape of the substitution is the fastest way to spot a unit or convention mistake.
The PACE Financing corridor: your result across a realistic band
The honest version of any estimate is a corridor, and this one is cheap to produce: PACE Financing was recomputed at 5 points along the dominant input, with every other field left untouched.
| Efficiency retrofit cost setting | Annual assessment |
|---|---|
| 80 % of the example value | $17,110 |
| 90 % of the example value | $19,249 |
| example inputs | $21,388 |
| 110 % of the example value | $23,527 |
| 120 % of the example value | $25,665 |
That spread — $17,110 at the low end, $25,665 at the high — is what a careful read of PACE Financing looks like: a band you can state out loud, with the reason for each edge. Reproduce it in the form above by editing Efficiency retrofit cost alone; the substitution steps will follow your figures exactly.
What actually moves your PACE Financing
Nobody should have to guess which input matters. The engine was re-run once per field below — ten percent up, ten percent down, everything else frozen — and the results ranked by how far they moved the annual assessment. It is the fastest honest answer to “what matters most in PACE Financing?” — and it is specific to these defaults, because sensitivity moves with the starting point.
- Efficiency retrofit cost +10 % → PACE Financing = $23,527 · −10 % → $19,249 (the annual assessment shifts ≈10.0 %)
- Nudge Assessment term by ±10 % and PACE Financing lands between $20,446 and $22,570 (sensitivity ≈5.5 %)
- PACE assessment rate +10 % → PACE Financing = $22,493 · −10 % → $20,311 (the annual assessment shifts ≈5.2 %)
Efficiency retrofit cost is the dominant lever here: ten percent either way moves the result by about 10.0 %, from $19,249 to $23,527. Measure that input from a document rather than from memory, and treat Assessment term as the second priority (≈5.5 % per ten percent). Everything below that can stay approximate, which is a licence to stop chasing data that would not change the decision.
Is your PACE Financing good — reading the result bands
Nobody acts on a bare figure — they act on a figure with a comparison attached. The verdict attached to the default calculation — “Cash-flow positive from day one: $34,362/yr net savings — and the obligation transfers with the property, not you” — is one band on a ladder your own figure may sit somewhere else on. How much of that band is luck? On Efficiency retrofit cost alone ten percent either way covers $19,249 to $23,527. The practical reading rules: read the band as a starting hypothesis, then test it: change the two dominant inputs by ten percent and see whether the verdict survives. Verdicts that survive stress are the ones worth acting on.
Where PACE Financing sits next to similar measures: this tool answers “how much is the PACE Financing”, while the related calculators answer “what do I do about it”. Reading the result alone tends to over-weight a single snapshot; pairing it with the companion tools above turns the number into a decision.
How people get PACE Financing wrong
Mortgage lenders scrutinize senior assessments; disclose at refi/sale to avoid title surprises. This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Reporting the headline and quietly discarding Net annual position. The companions are where the shape of the trade-off survives the rounding.
One mistake is specific to this engine: assuming every input matters equally. The computation above shows Efficiency retrofit cost dominating — a careful figure there beats false precision everywhere else.
Another is comparing across contexts: a PACE Financing computed with one set of conventions should never be lined up against a figure computed with another. Check the inputs behind both before ranking them.
Before you trust your PACE Financing: a short checklist
- Compare the output against one published benchmark or a colleague’s independent estimate.
- Check that every field the formula needs actually arrived from a document, not from recollection.
- Put Efficiency retrofit cost under a magnifier; the sensitivity table above is the reason why.
- Verify each input against its original source document, not memory.
- State, in one sentence, which convention each rate, unit or period in the form is using.
- Repeat the ±10 % test on the inputs that matter and see whether the decision — not just the number — still holds.
How to use the PACE Financing tool properly
The tool does the arithmetic; the routine below is what makes the arithmetic trustworthy. Five steps, a minute total — and afterwards you will know not just what the number is, but which assumption produced it.
Step 1 — one document, one pass. Open the statement, label or record that holds efficiency retrofit cost ($), pace assessment rate (%), assessment term (years), annual energy savings ($) and transcribe straight into the form. Transcription from a single source removes the mismatch errors that appear when figures are assembled from three different places. A result worth acting on survives having its two shakiest inputs halved.
Step 2 — enter the conservative case first. Resist the flattering scenario. Type the inputs you would defend in front of a sceptical reader, read the Annual assessment ($21,388 for the example values), and note the verdict band. Say the answer out loud before you save it; if it sounds wrong, the model did not change, your understanding did.
Step 3 — isolate your variables. Change one field, observe, revert. The live sensitivity list does the ranking for the default inputs; verify it against your own, because dominance shifts when the starting point shifts. A figure nobody can reproduce is a figure nobody will act on twice.
Step 4 — stress before you commit. A decision that survives a ten-percent squeeze on its two biggest inputs needs no luck to be sound. One that does not survive is a decision about hope, not about arithmetic. Say the answer out loud before you save it; if it sounds wrong, the model did not change, your understanding did.
Step 5 — record the context, not just the number. Note today’s date and the inputs alongside the $21,388 output. Six months from now the context is what turns this figure into a trend. Suspiciously tidy answers deserve the same scrutiny as untidy ones.
Where PACE Financing matters in practice
Most Commercial Real Estate disagreements are arithmetic disagreements in disguise. When Annual assessment of $21,388 sits on the table with its working shown, the conversation stops being about who sounds more confident and starts being about which input is wrong. Numbers are cheap to produce and expensive to retract; the extra minute is the cheapest insurance available.
The companion outputs — Net annual position and Assessment as % of savings — exist for the second stage of that screen: the headline sizes the prize, while the companions describe the trade-off you are accepting to get it. The fastest sanity test is to guess the answer first and see how far the calculation disagrees.
There is a personal-administration use people overlook: periodic self-checking. PACE Financing quietly drifts as life changes — rates move, bodies change, costs compound — and re-running it a few times a year catches drift while correction is still cheap. If a result feels obviously right, that is the moment to check the inputs hardest.
The questions that come up most about PACE Financing
What affects PACE Financing the most?
The short answer: Efficiency retrofit cost. The longer answer is the sensitivity table on this page, where every numeric input was probed by ten percent and the annual assessment recalculated — Efficiency retrofit cost moved it furthest, by roughly 10.0 % ($19,249 to $23,527).
Which matters more: assessment term or efficiency retrofit cost?
Efficiency retrofit cost, by a factor of about 1.8. Concretely: ten percent on Efficiency retrofit cost is worth ≈10.0 % of PACE Financing, the same nudge on Assessment term only ≈5.5 %. That ranking is re-computed for each page from that page’s own defaults.
What is a typical PACE Financing?
There is no honest universal average for PACE Financing, but there is a reference point: the defaults on this page produce $21,388 (Cash-flow positive from day one: $34,362/yr net savings — and the obligation transfers with the property, not you). Replace the inputs with your own and compare — that comparison is the useful meaning of “typical”.
How do I calculate PACE Financing by hand?
Use the stated model — Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill) — and substitute in the order the tool prints (it starts from Amortize $240,000 at 6.5%/20y → $21,388/yr). On the example inputs the hand route lands on $21,388, exactly what the calculator shows. A spreadsheet reproduces it in two or three cells; doing it once by hand is what makes the automated answer trustworthy.
What happens to PACE Financing if efficiency retrofit cost changes by 10 %?
On these inputs a ±10 % change in efficiency retrofit cost takes PACE Financing to $23,527 against the $21,388 example — around 10.0 % of the headline. The same test on every other field is in the sensitivity section.
Is the PACE Financing result of $21,388 good or bad?
The tool answers “what”, not “whether”: $21,388 carries the verdict “Cash-flow positive from day one: $34,362/yr net savings — and the obligation transfers with the property, not you” for the default case, which is a starting interpretation rather than a verdict on your situation. Re-run with your own figures and compare the bands.
How often should I check PACE Financing?
Whenever an input changes by more than a few percent, and otherwise on the rhythm of your decisions — before a purchase, a review, a renewal. PACE Financing is a snapshot, not a subscription; stale snapshots are the most common silent error in Real Estate & Property planning.
Is PACE Financing accurate?
The arithmetic is exact: Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill) is evaluated with full floating-point precision and every substitution is printed in the worked example. What limits accuracy is input quality and the model’s assumptions, so treat the $21,388 result as the correct answer to the question you typed — and check the assumptions section before acting on it.
Residential available?
CA mostly; commercial PACE exists in 35+ states — check enabling legislation.
What happens at refinance?
Subordination or pay-off; C-PACE underwriting now handles most lenders.
Do I need an account to use this PACE Financing calculator?
No, and no data leaves the tab. The engine runs in the page itself, which is why the worked example, the bands and the sensitivity ranking all respond instantly to your keystrokes.
The vocabulary of PACE Financing
- Net annual position
- $34,362 in the default PACE Financing calculation — one of the secondary figures an experienced reader checks before trusting the primary number.
- Assessment as % of savings
- 38.4 % in the default PACE Financing calculation — one of the secondary figures an experienced reader checks before trusting the primary number.
- Total cost financed
- $427,756 for the PACE Financing worked case; it sits next to the main result because it carries context the headline leaves out.
- Annual assessment
- The primary output of this tool: $21,388 for the default inputs, computed exactly from Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill).
- Worked example
- Every substitution in order, from the example inputs to $21,388 — the audit trail for the headline figure.
- Verdict band
- The interpretation attached to a result (“Cash-flow positive from day one: $34,362/yr net savings — and the obligation transfers with the property, not you” on these inputs), which turns a bare number into a position on a scale.
- Sensitivity (±10 %)
- How far the PACE Financing moves when a single input is nudged ten percent either way; the ranked list on this page is computed live from this engine.
Where the PACE Financing model comes from
Everything above runs on one stated formula, applied without hidden coefficients: Annual assessment = amortized cost; net = savings − payment (assessment rides the tax bill). Source of record: PACENational Association C-PACE data. Specialist software layers extra coefficients on top of the same algebra; none are hidden here, and that transparency is what makes a disagreement traceable to a specific input instead of a black box.
This page is an estimation aid, not professional advice. The design rule is simple: two people entering identical figures must get identical answers. The design constraint was set by usefulness rather than by comfort: an estimate you can interrogate beats an answer you have to trust.
After the number: what to do with it
Save the number together with its inputs and today’s date; a PACE Financing figure without context is unusable the moment an input changes.
This page was written for people who need one trustworthy number before their next decision, and the promise is that nothing above required trust. Bookmark the tool, re-run it whenever an input moves by more than a few percent, and keep the date with the number.