Address surcharge math · estimates as of 2026-09-01
Starlink demand surcharge break-even
Direct answer
A Starlink demand surcharge is a one-time, address-specific congestion fee (often $0–$1,500) on Residential checkout — not a national list price. Break-even versus Roam ≈ surcharge ÷ (Roam monthly − Residential monthly) when Roam is more expensive per month. Example: a $500 surcharge, Residential 100 at $55 vs Roam Unlimited at $175 → about 4.2 months. If Roam’s monthly rate is equal or lower (both 100-tier plans are $55 here), any surcharge makes Residential more expensive from day one in this model. Enter the fee your address shows on starlink.com; StarCost is unofficial.
What a demand surcharge is
A demand (congestion) surcharge is a one-time fee that can appear at Residential checkout in busy cells. Public reports put it anywhere from $0 to about $1,500. It is not a published national rate — drag the slider to whatever starlink.com shows for your address. Roam typically does not attach service to a home address, so this calculator treats Roam’s surcharge as $0 in the side-by-side.
Break-even vs Roam
The question is how many months of extra Roam service cost equal the surcharge you would pay to stay on Residential. Hardware, install, tax, and electricity are the same on both sides so the math isolates the fee.
Formula: break-even months = surcharge ÷ (Roam monthly − Residential monthly), when Roam is more expensive per month. If Roam’s monthly rate is lower or equal, any surcharge makes Residential more expensive from day one in this model.
Worked examples
Same hardware on both sides. Change the slider in the calculator to match your checkout.
| Surcharge | Residential /mo | Roam /mo | Read |
|---|---|---|---|
| $250 | $55 | $55 | Equal monthly rates. Roam wins as soon as the surcharge is greater than $0. |
| $500 | $55 | $175 | $120 extra per month on Roam Unlimited. 500 ÷ 120 ≈ 4.2 months. |
| $1500 | $85 | $80 | Roam 300GB is $5 cheaper per month than Residential 200, so Roam wins at every horizon if it avoids the surcharge. |
When paying the surcharge still wins
If you compare Residential 100 to Roam Unlimited and expect to keep service well past the break-even month, the one-time fee is cheaper than $120 extra every month. Residential also stays unlimited with home-plan priority. Use Roam as a cost floor only when the surcharge is large, the stay is short, or a data allotment is acceptable.
Residential vs Roam break-even
Same hardware, install, tax, and electricity. Surcharge is applied to Residential only — Roam is modeled at $0 surcharge because it typically avoids a fixed-address fee. Surcharge math.
| Horizon | Residential 100 | Roam 100GB |
|---|---|---|
| Month-1 | $404 | $404 |
| Year-1 | $1,009 | $1,009 |
| Monthly service | $55 | $55 |
The two families tie at this horizon in this model.
Monthly rates are equal or Roam is cheaper ($55 vs $55). Any Residential surcharge makes Roam win from month 1 in this comparison.
- Month-1
- $404
- Year-1 TCO
- $1,009
Surcharge questions
Does the Starlink demand surcharge apply to Roam?
The surcharge is address-specific and typically appears on Residential checkout in congested cells. Roam usually does not require a fixed service address, so it typically avoids that surcharge — that is the comparison StarCost models. Some third-party reports say a surcharge can still appear in certain Roam activations. Treat $0 as the Roam default and verify the live cart.
How do I estimate demand-surcharge break-even vs Roam?
If Roam’s monthly rate is higher than Residential, extra monthly cost × months eventually exceeds the one-time surcharge. Break-even months ≈ surcharge ÷ (Roam monthly − Residential monthly). Example: $500 surcharge and Roam Unlimited at $175 vs Residential 100 at $55 is $120 extra per month, so about 4.2 months. After that, paying the surcharge and staying on Residential is cheaper in this model. If monthly rates are equal (both $55), any surcharge makes Residential more expensive from month 1.
What is Starlink first-year TCO?
First-year total cost of ownership (TCO) is hardware for the year (the kit purchase, or 12 × monthly rent) plus 12 × the monthly plan, plus one-time surcharge and install, plus optional tax and optional dish electricity. Defaults: $349 + 12 × $55 = $1,009 before tax, surcharge, or install. StarCost does not include shipping or accessories unless you add them as install.
Are these official Starlink prices?
No. Presets are unofficial US list-price estimates dated 2026-09-01 (Aug/Sep 2026 public bands). Live checkout is authoritative and can include promotions, regional hardware pricing, shipping, or a surcharge that never appears on marketing pages.
More detail lives in the full FAQ and methodology.