Website maintenance cost calculator
Estimate annual maintenance cash costs, owner time and a contingency allowance separately.
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How the calculation works
Annual cash allowance = software + 12 × backup + contingency. Time value = 12 × hours × hourly value. Your own time is an opportunity cost, not an automatic cash payment. The reserve is an allowance, not an expected bill.
Before you decide
Run a low, expected and high-cost scenario. Confirm contract terms and what is excluded, then keep the assumptions alongside your result. A precise calculation is only as useful as the figures you put into it.
Read the planning guides →Use the number as a decision aid.
Cash and time are different
Software, backup services and paid support are cash expenses. Your own maintenance hours are an opportunity cost unless you pay someone for them. Showing both helps compare doing the work yourself with buying support without pretending that every hour leaves the bank account.
A worked annual plan
Two owner hours per month valued at $20 represent $480 of annual time value. Add $60 of software, $6 monthly backup service and a $100 contingency: the cash allowance is $232 while the combined planning value is $712. Keep those figures separate when deciding what is affordable.
Define the maintenance tasks
List updates, form tests, content corrections, backup checks, access reviews and recovery drills. Assign a frequency and owner. A monthly fee cannot be evaluated until you know what work it includes, what is excluded and how completion is recorded.
Review the estimate with evidence
Track actual hours and invoices for several months. If contingency is repeatedly used for predictable tasks, move those tasks into the base allowance. If maintenance time is close to zero, verify that essential checks are not simply being skipped.
Estimate maintenance savings carefully
A lower maintenance cost is only a saving when the same necessary work and response expectations are covered. Compare the cost of planned updates, testing and backups with the likely disruption from deferred work, but do not invent an avoided-loss figure. Record actual hours, supplier invoices and incidents. Those observations make the next estimate more useful than a generic percentage of the original build price.