compare_balance_transfer

Compare staying on your current home loan vs refinancing to a lower rate — net saving, switching cost, breakeven month. Not financial advice.

Endpoint POST https://api.avnester.com/public/v1/compare_balance_transfer

Parameters

The most-used parameters. Full schema in the OpenAPI document.

outstandingPrincipalnumberrequired: Current outstanding principal in INR.
currentRatePercentnumberrequired: Current annual interest rate (%).
newRatePercentnumberrequired: New lender annual interest rate (%).
remainingTenureYearsnumberrequired: Years left on the loan.
processingFeePctnumberoptional: New-lender processing fee on the balance (%). Defaults to 0.5%.
flatCostsnumberoptional: Flat legal + valuation charges in INR. Defaults to ₹12,500.

Worked example

# transfer a ₹30L loan from 9.5% to 8.0%, 15 years left

curl -X POST https://api.avnester.com/public/v1/compare_balance_transfer \
  -H 'Content-Type: application/json' \
  -d '{
       "outstandingPrincipal": 3000000,
       "currentRatePercent": 9.5,
       "newRatePercent": 8.0,
       "remainingTenureYears": 15
     }'

Response

{
  "currentEmi": 31328,
  "newEmi": 28670,
  "monthlyEmiSaving": 2658,
  "grossInterestSaved": 478000,
  "switchingCost": 27500,
  "netSaving": 450500,
  "breakevenMonths": 11,
  "worthIt": true,
  "attribution": "AVnester",
  "disclaimer": "..."
}

Run this example in the playground

Rate limits

OAuth (Developer)

30 / min

The same ceiling applies to every tool on a given plan, on both the MCP and REST transports; every plan’s is on Pricing. OAuth registration is free and self-serve. Calls made without signing in have their own per-IP limits — see the quickstart.

Common errors

400Invalid request body
Check required parameters and types. The error.message field will name the offending parameter.
429Rate limit exceeded
Back off until the time in the Retry-After header. Signed in with OAuth, the per-tool limit is counted per user instead of per address; a paid plan raises it.
429Daily call limit reached (calls without signing in)
Retry-After counts to 00:00 UTC, and only calls that returned an answer count. Signed in, calls count against your plan instead of your IP address.

Next steps

→ Try compare_balance_transfer in the playground (no signup)
→ Register an OAuth client (free on the Developer plan)
→ Browse the other 10 tools
→ Full schema in the OpenAPI spec