The moment that brings most founders to us looks the same: the app works just well enough to demo, something important is broken or unfinished, and the thought of asking an agency "what will this cost?" feels like opening a door you cannot close. You are afraid the answer is "it depends" followed by an hourly meter that runs until the budget is gone. That fear is rational, and it is exactly what this post is built to remove, because every number we quote is fixed before a line of code is touched.
Fixing a Base44 app typically begins with a $497 production audit, followed by a fixed-price fix sprint: $1,500 for one isolated defect, or $3,000 for a complex rescue covering up to eight related bugs. The audit fee credits toward the fix, so a single-issue repair is $1,500 total. Finishing an unfinished app is a build, starting at $4,500. Every tier is a flat fee set before work starts, backed by a money-back guarantee.
The honest answer: it depends on these 3 things
"It depends" is the answer you were dreading, but the dependency is not a black box. Across the 100-plus Base44 apps we have shipped and debugged in production, the final cost of a fix is decided by exactly three variables, and you can estimate all three yourself before you ever talk to us. We call them the three cost levers, and once you understand them, the quote stops feeling like a guess.
The first lever is blast radius — how many parts of the app the problem touches. A broken Stripe webhook is contained: it lives in one integration and one function, and fixing it does not ripple into your auth or your data model. A data-integrity problem where the AI agent rewrote your schema and orphaned half your records has a wide blast radius, because every screen that reads those records is now suspect. Narrow blast radius means a single-issue sprint. Wide blast radius means a complex fix.
The second lever is diagnosis difficulty — whether the failure pattern is one we already have a playbook for. The reason a fixed price is even possible is that most Base44 bugs are not unique. We have seen the same auth-bypass-after-AI-edit, the same function-timeout, the same published-changes-not-appearing cache bug dozens of times. When a symptom matches a known playbook, diagnosis is hours, not days, and the price reflects that. A genuinely novel business-logic regression takes longer to isolate, which is the difference between the standard and complex tiers.
The third lever is whether it is a fix or a finish. This distinction matters more than founders expect. Repairing behavior that used to work, or should work, is a fix sprint. Adding functionality that was never built — a payments flow you only stubbed out, a reporting dashboard you described but the AI never completed — is a build, priced differently because it is net-new engineering, not repair. Many "fix my app" requests are really "finish my app" requests in disguise, and naming that early is what keeps the quote honest. If you are unsure which side of the line you sit on, our breakdown of whether you need a developer for your Base44 app walks through the signals.
What a $497 Base44 audit includes
Almost every engagement starts here, and for a reason: you cannot get a trustworthy fix quote without first knowing what is actually wrong. The production audit is a fixed $497, and it buys a senior engineer inside your workspace for a structured, several-hour review — not a sales call dressed up as a diagnostic. The deliverable is a written report you keep regardless of whether you hire us for the fix.
The audit runs against what we call the six review surfaces, the areas where AI-generated Base44 apps most reliably hide problems:
| Review surface | What we check | Why it matters to cost |
|---|---|---|
| Auth & access | Login flows, SSO, tenant isolation, post-signup enforcement | A bypass is a security incident, not a cosmetic bug |
| Data integrity | Schema sanity, orphaned records, RLS rules after AI edits | Wide blast radius; drives the complex-fix tier |
| Payments | Stripe wiring, webhook signatures, subscription grant logic | Silent revenue loss is the most expensive failure mode |
| Performance | Slow queries, editor hangs, render bottlenecks | Usually a single-issue sprint unless it is structural |
| AI regressions | Code the agent broke, hallucinated fields, fake endpoints | Determines whether a snapshot revert is viable |
| Production readiness | Logging, error handling, deploy pipeline, env config | Decides whether the app can safely launch at all |
Each issue we find is ranked by severity, traced to its root cause rather than its symptom, and attached to a fixed-price quote to fix it. You also get a plain verdict on whether the app is production-ready today. The economic point is the part founders underweight: if we find a critical issue, the $497 credits in full against any fix-sprint engagement you book. So when you proceed to a fix, the audit was effectively free — you were always going to need the diagnosis, and now you are not paying for it twice. If you want to pressure-test your app against the same checklist we use, our production readiness audit checklist is the public version of the internal rubric.
Typical fix-sprint vs complex-fix pricing
Once the audit names the problem, the fix maps to one of two fixed-price tiers, plus the build tiers for anything that is net-new. Here are the real numbers we quote, the same ones on our fix-sprint page:
| Engagement | Fixed price | What it covers | Typical timeline |
|---|---|---|---|
| Production audit | $497 | Full diagnostic + written report + fixed-price quote | 1 business day |
| Single-issue fix sprint | $1,500 | One isolated defect, known or novel | 48–72 hours |
| Complex fix | $3,000 | Up to 8 related defects, wide blast radius | 3–5 business days |
| MVP build | from $4,500 | Finishing an unfinished app to launchable | 2–4 weeks |
| Standard build | around $9,000 | Larger feature set, integrations, polish | 4–6 weeks |
| Premium build | from $15,000 | Complex app, multiple integrations, scale work | 6+ weeks |
The line that matters most to budgeting is the gap between $1,500 and $3,000. A single-issue sprint is the right tier when the audit finds one defect with a narrow blast radius — your Stripe subscription not granting access, a login loop, an image upload that silently fails. A complex fix is the right tier when the issues are tangled: an AI-agent regression that broke three features at once, or a schema problem touching every screen that reads the affected entity. We assign the tier on the call, in writing, before you pay, which means you are never surprised into the higher number mid-engagement.
For the genuinely urgent cases — payments down, app fully unreachable, active data loss — the same fixed prices apply with no surcharge; you are paying for the held slot, not a panic premium. The mechanics of that are in our write-up on emergency Base44 bug-fix response. And if your real situation is "this was never finished," price it as a build: our guide to finishing a half-built Base44 app explains why the cost to finish a Base44 app is scoped differently from a repair.
What can push a fix into the higher tier
Three things move a $1,500 sprint toward the $3,000 tier, and naming them lets you predict it yourself. Wide data blast radius is the first: when the fix requires reasoning about every record and every screen that touches a corrupted entity. Stacked regressions are the second: when one AI edit broke several features and each needs its own root-cause trace. The third is missing reproduction: when the bug is intermittent and we have to instrument the app before we can even see it fail reliably. None of these are surprises if the audit was done first — that is the entire point of auditing before quoting.
Why fixed-price beats hourly for non-technical owners
If you have been quoted an hourly rate, here is the structural problem with it, stated plainly. Hourly billing transfers the risk of a hard-to-diagnose bug onto the person least equipped to judge it — you. When a freelancer says a bug "took fourteen hours," you have no way to know whether that was reasonable diagnosis or a meter running on someone learning Base44 on your dime. The information asymmetry is total, and it always runs against the non-technical owner.
Fixed pricing inverts that. When we quote $1,500, the risk of the bug being harder than expected sits on us, because we have shipped the same failure patterns across more than 100 apps and we price from that experience. That alignment changes the incentives in your favor: an hourly developer profits from a slow diagnosis, while a fixed-price team profits from a fast one. We are motivated to recognize the root cause in the first hour, not the eighth.
| Dimension | Hourly billing | Fixed-price sprint |
|---|---|---|
| Who carries the risk of a hard bug | You | Us |
| Do you know the total upfront | No | Yes |
| Incentive on diagnosis speed | Slower bills more | Faster is better |
| Surprise overruns possible | Yes | No |
| Requires you to judge "reasonable hours" | Yes | No |
There is a second, quieter benefit. Fixed pricing forces scope to be explicit before work begins, which means the conversation about what is and is not included happens up front, in writing, instead of as an awkward dispute at invoice time. For a deeper comparison of how this plays out between solo freelancers and teams, our analysis of freelancer versus agency for Base44 work covers where each model's pricing actually breaks down.
How to avoid a bill that balloons
The fear of a ballooning bill is the real reason founders delay asking for a quote, so let me give you the four guardrails we build into every engagement — call them the four anti-balloon controls. Each one closes a specific way that small-project budgets blow up.
Audit before you commit to a fix. The single most common cause of a ballooning bill is starting work before anyone knows the true scope. A $497 audit that converts into a known fixed quote eliminates the "we found more than expected, here's a change order" pattern entirely. You spend $497 to buy certainty, and that certainty credits back when you proceed.
Insist on a written scope tied to a fixed number. A real fixed-price quote names exactly which defects are covered and what "done" means. If a quote cannot tell you what is included, it is an hourly arrangement wearing a fixed-price label. Ours lists the specific issues from the audit by severity, so there is no ambiguity about what your money buys.
Separate fixes from finishes deliberately. Budgets balloon when a "quick fix" quietly becomes "and while you're in there, build this too." We keep repairs and net-new builds on separate line items with separate prices, so scope creep has to be a conscious, priced decision rather than an accident. You can model the trade-offs yourself with our cost calculator before you commit.
Use the money-back guarantee as your floor. Every fix sprint carries a money-back guarantee: if we cannot ship a working resolution, you are refunded. That is your downside protection. It also means we will tell you on the intake call when a symptom looks platform-side and unfixable in code, so you can decide whether to spend on the diagnostic at all rather than discovering it after the invoice.
Taken together, these four controls mean the worst-case number is knowable from the start. The most you are exposed to before committing is $497, and that converts to credit the moment you proceed. There is no version of this where the bill quietly triples while you watch.
Start with a $497 audit that credits toward the fix
If you have read this far, the next step is almost always the same regardless of what is broken: get the diagnosis before you get the quote. The reason is the entire thesis of this post — you cannot budget a fix you have not scoped, and scoping is exactly what a $497 production audit delivers. A senior engineer goes into your workspace, runs the six review surfaces, and hands you a written report ranking every issue by severity with a fixed-price quote attached. If we find a critical issue, the $497 audit fee credits against any fix-sprint engagement, so it is effectively free when you proceed, and the fix sprint itself starts at $1,500 with a money-back guarantee if we cannot ship a working resolution. You can book the audit directly and have the verdict in one business day.
What you are buying with that first $497 is not just a report — it is the end of the open-ended-bill fear. The number stops depending on a meter and starts depending on three things you can now estimate yourself: blast radius, diagnosis difficulty, and whether you need a fix or a finish. As the lead engineer at Base44Devs, the advice I give founders who are nervous about cost is the same every time: spend the $497 to convert "it depends" into a fixed number, then decide. The audit is the cheapest way to make the expensive decision well.
Related reading
- Base44 emergency bug-fix response — how urgent fixes are priced and scheduled with no panic surcharge.
- Finishing a half-built Base44 app — why the cost to finish a Base44 app is scoped as a build, not a repair.
- Production readiness audit checklist — the public version of the rubric our $497 audit runs against.
- Freelancer vs agency for Base44 work — where each pricing model actually breaks down for non-technical owners.
- The true cost of running a Base44 app — the ongoing hosting, credit, and maintenance costs that outlast any one-time fix.
- Base44 cost calculator — model fix and build budgets before you talk to anyone.